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139-501: A megacity is a very large city , typically with a population of more than 10 million people. The United Nations Department of Economic and Social Affairs (UN DESA) in its 2018 "World Urbanization Prospects" report defines megacities as urban agglomerations with over 10 million inhabitants. A University of Bonn report holds that they are "usually defined as metropolitan areas with a total population of 10 million or more people". Elsewhere in other sources, from five to eight million

278-460: A green belt aimed at preventing the city from sprawling out into neighboring Gyeonggi Province. These areas are frequently sought after by people looking to escape from urban life on weekends and during vacations. Air pollution is a major issue in Seoul. According to the 2016 World Health Organization Global Urban Ambient Air Pollution Database, the annual average PM2.5 concentration in 2014

417-455: A 12.85% increase from June 2010. The next largest group was Chinese citizens who were not of Korean ethnicity; 29,901 of them resided in Seoul. The next highest group consisted of the 9,999 United States citizens who were not of Korean ancestry. The next highest group were Taiwanese citizens, at 8,717. The two major religions in Seoul are Christianity and Buddhism . Other religions include Muism (indigenous religion) and Confucianism . Seoul

556-573: A central area containing buildings with special economic, political, and religious significance. Archaeologists refer to this area by the Greek term temenos or if fortified as a citadel . These spaces historically reflect and amplify the city's centrality and importance to its wider sphere of influence . Today cities have a city center or downtown , sometimes coincident with a central business district . Cities typically have public spaces where anyone can go. These include privately owned spaces open to

695-665: A central authority. The term can also refer either to the physical streets and buildings of the city or to the collection of people who dwell there and can be used in a general sense to mean urban rather than rural territory . National censuses use a variety of definitions – invoking factors such as population , population density , number of dwellings , economic function, and infrastructure – to classify populations as urban. Typical working definitions for small-city populations start at around 100,000 people. Common population definitions for an urban area (city or town) range between 1,500 and 50,000 people, with most U.S. states using

834-461: A central point. This form could evolve from successive growth over a long time, with concentric traces of town walls and citadels marking older city boundaries. In more recent history, such forms were supplemented by ring roads moving traffic around the outskirts of a town. Dutch cities such as Amsterdam and Haarlem are structured as a central square surrounded by concentric canals marking every expansion. In cities such as Moscow , this pattern

973-513: A clear legal framework of responsibility, publicly checkable results and a major focus on reduction of transport pollutants. In July 2020, South Korea, then the 11th largest world economy, announced a US$ 35 billion position on ending investment in coal. In November 2020, South Korea committed to a carbon-neutral economy by 2050. Between 2005 and 2021 annual concentration levels of small particulate matter (PM10) fell by 30-40 % in Seoul, whilst concentrations of larger particulate matter (PM 2.5) in

1112-539: A combination of these. Societies that live in cities are often called civilizations . The degree of urbanization is a modern metric to help define what comprises a city: "a population of at least 50,000 inhabitants in contiguous dense grid cells (>1,500 inhabitants per square kilometer)". This metric was "devised over years by the European Commission , OECD , World Bank and others, and endorsed in March [2021] by

1251-657: A common backdrop in dystopian science fiction , with examples such as the Sprawl in William Gibson 's Neuromancer , and Mega-City One , a megalopolis of between 50 and 800 million people (fluctuations due to war and disaster) across the east coast of the United States , in the Judge Dredd comic. In Demolition Man a megacity called " San Angeles " was formed from the joining of Los Angeles , Santa Barbara , San Diego and

1390-604: A continuous urban landscape called urban agglomeration , conurbation , or megalopolis (exemplified by the BosWash corridor of the Northeastern United States .) The emergence of cities from proto-urban settlements , such as Çatalhöyük , is a non-linear development that demonstrates the varied experiences of early urbanization . The cities of Jericho , Aleppo , Byblos , Faiyum , Yerevan , Athens , Matera , Damascus , and Argos are among those laying claim to

1529-430: A distinctive elite social class, but it should indeed be considered a city based on a functional redefinition of urban development. In particular, Jenné-Jeno featured settlement mounds arranged according to a horizontal, rather than vertical, power hierarchy, and served as a center of specialized production and exhibited functional interdependence with the surrounding hinterland. More recently, scholars have concluded that

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1668-424: A given area. But others associate it with decentralization (spread of population without a well-defined center), discontinuity (leapfrog development), segregation of uses, etc. Gentrification and urban gentrification are terms for the socio-cultural changes in an area as a result of wealthier people buying property in a less prosperous community. As living costs rise, lower-income residents are forced to move out of

1807-466: A grid plan with specialized districts used across the Hellenistic Mediterranean . The urban-type settlement extends far beyond the traditional boundaries of the city proper in a form of development sometimes described critically as urban sprawl . Decentralization and dispersal of city functions (commercial, industrial, residential, cultural, political) has transformed the very meaning of

1946-450: A homeless person remain in an emergency homeless shelter it was thought to be better to quickly get the person permanent housing of some sort and the necessary support services to sustain a new home. But there are many complications with this kind of program and these must be dealt with to make such an initiative work successfully in the middle to long term. Traffic congestion is a condition on road networks that occurs as use increases, and

2085-507: A key role in both the economy and government. Late antique cities in the East were also undergoing intense transformations, with increased political participation of the crowds and demographical fluctuations. Christian communities and their doctrinal differences increasingly shaped the urban fabric. The locus of power shifted to Constantinople and to the ascendant Islamic civilization with its major cities Baghdad , Cairo , and Córdoba . From

2224-520: A minimum between 1,500 and 5,000 inhabitants. Some jurisdictions set no such minima. In the United Kingdom , city status is awarded by the Crown and then remains permanent. (Historically, the qualifying factor was the presence of a cathedral , resulting in some very small cities such as Wells , with a population of 12,000 as of 2018 , and St Davids , with a population of 1,841 as of 2011 .) According to

2363-466: A native Korean (as opposed to Sino-Korean ) common noun simply meaning 'capital city.' The word seoul is believed to have descended from Seorabeol (서라벌; historically transliterated into the Hanja form 徐羅伐 ), which originally referred to Gyeongju , the capital of Silla . Wiryeseong ( 위례성 ; 慰禮城 ), the capital settlement of Baekje , was located within the boundaries of modern-day Seoul. Seoul

2502-516: A new capital. After several governmental debates, Yi Seong-gye chose Hanyang (Sindo) instead of Muak in September 1394. As Joseon's new capital, Hanyang was planned as a geographic embodiment of Korean Confucianism . Construction of the city began in October 1394. During its early construction stages, some major palaces, including Gyeongbokgung , were finished in 1395. The Fortress Wall surrounding Hanyang

2641-688: A privileged elite among towns having won self-governance from their local lord or having been granted self-governance by the emperor and being placed under his immediate protection. By 1480, these cities, as far as still part of the empire, became part of the Imperial Estates governing the empire with the emperor through the Imperial Diet . By the 13th and 14th centuries, some cities become powerful states, taking surrounding areas under their control or establishing extensive maritime empires. In Italy, medieval communes developed into city-states including

2780-442: A result, some critics argue that sprawl has certain disadvantages including longer transport distances to work, high car dependence , inadequate facilities (e.g. health, cultural. etc.) and higher per-person infrastructure costs. Discussions and debates about sprawl are often obfuscated by the ambiguity associated with the phrase. For example, some commentators measure sprawl only with the average number of residential units per acre in

2919-495: A rule cannot produce their own food and therefore must develop some relationship with a hinterland that sustains them. Only in special cases such as mining towns which play a vital role in long-distance trade, are cities disconnected from the countryside which feeds them. Thus, centrality within a productive region influences siting, as economic forces would, in theory, favor the creation of marketplaces in optimal mutually reachable locations. The vast majority of cities have

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3058-549: A super-wealthy elite living in gated communities and large masses of people living in substandard housing with inadequate infrastructure and otherwise poor conditions. Cities around the world have expanded physically as they grow in population, with increases in their surface extent, with the creation of high-rise buildings for residential and commercial use, and with development underground. Urbanization can create rapid demand for water resources management , as formerly good sources of freshwater become overused and polluted, and

3197-423: A temple. A minority viewpoint considers that cities may have arisen without agriculture, due to alternative means of subsistence (fishing), to use as communal seasonal shelters, to their value as bases for defensive and offensive military organization, or to their inherent economic function. Cities played a crucial role in the establishment of political power over an area, and ancient leaders such as Alexander

3336-567: A workers' town associated with the pyramid of Senusret II , and the religious city Amarna built by Akhenaten and abandoned. These sites appear planned in a highly regimented and stratified fashion, with a minimalistic grid of rooms for the workers and increasingly more elaborate housing available for higher classes. In Mesopotamia, the civilization of Sumer , followed by Assyria and Babylon , gave rise to numerous cities, governed by kings and fostered multiple languages written in cuneiform . The Phoenician trading empire, flourishing around

3475-429: Is characterized by slower speeds, longer trip times, increased pollution, and increased vehicular queueing . The Texas Transportation Institute estimated that, in 2000, the 75 largest metropolitan areas experienced 3.6 billion vehicle-hours of delay, resulting in 5.7 billion U.S. gallons (21.6 billion liters) in wasted fuel and $ 67.5 billion in lost productivity, or about 0.7% of the nation's GDP . It also estimated that

3614-734: Is considered the minimum threshold, along with a population density of at least 2,000 per square kilometre. The terms conurbation , metropolis , and metroplex are also applied to the latter. The total number of megacities in the world varies between different sources and their publication dates. The world had 33 according to UN DESA (in 2018), 25 according to the OCDE, 45 according to CityPopulation.de (in 2023), and 44 according to Demographia (in 2023). A good percentage of these urban agglomerations are in China and India . The other four countries with more than one megacity are Brazil , Japan , Pakistan , and

3753-486: Is evidence of the consumption of cooked grain and fish by 3,000 B.C. Around 1,500 B.C., communities began transitioning into the Bronze Age and farming at scale. Due to modern Seoul's significant urbanization, Amsa-dong Neolithic Site  [ ko ] is the only known major archaeological site in Seoul where Stone Age materials have been found, although such materials have also been found in minor sites throughout

3892-441: Is headed by a mayor and three vice mayors, and is divided into 25 autonomous districts and 522 administrative neighborhoods. Seoul is divided into 25 " gu " ( 구 ; 區 ) (district). The gu vary greatly in area (from 10 to 47 km or 3.9 to 18.1 sq mi) and population (from fewer than 140,000 to 630,000). Songpa has the most people, while Seocho has the largest area. The government of each gu handles many of

4031-449: Is hereby constituted a municipal corporation to be known as SEOUL. The boundaries of the municipal corporation are the present limits of the City of Seoul consisting of the following eight districts: Chong Koo , Chong No Koo , Sur Tai Moon Koo , Tong Tai Moon Koo , Sung Tong Koo , Ma Po Koo , Yong San Koo , and Yang Doung Po Koo , and as such may be extended as provided by law. Seoul under

4170-708: Is home to one of the world's largest Christian congregations, Yoido Full Gospel Church , which has around 830,000 members. According to the 2015 census, 10.8% of the population follows Buddhism and 35% follows Christianity (24.3% Protestantism and 10.7% Catholicism). 53.6% of the population is irreligious. Seoul is home to the world's largest modern university founded by a Buddhist Order, Dongguk University . Compulsory education lasts from grade 1–9 (six years of elementary school and three years of middle school). Students spend six years in elementary school, three years in middle school, and three years in high school. Secondary schools generally require students to wear uniforms. There

4309-576: Is in the northwest of South Korea. Seoul proper comprises 605.25 km (233.69 sq mi), with a radius of approximately 15 km (9 mi), roughly bisected into northern and southern halves by the Han River . The river is no longer actively used for navigation, because its estuary is located at the borders of the two Koreas, with civilian entry barred. There are four main mountains in central Seoul: Bugaksan , Inwangsan , Naksan and Namsan . The Seoul Fortress Wall , which historically bounded

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4448-635: Is not a Sino-Korean word, 'Seoul' has no inherently corresponding Hanja ( Chinese characters used in the Korean language). Instead of phonetically transcribing 'Seoul' to Chinese, in the Chinese-speaking world, Seoul was called Hànchéng ( 汉城 ; 漢城 ), which is the Chinese pronunciation of Hanseong . On 18 January 2005, the Seoul Metropolitan Government changed Seoul's official Chinese name from

4587-508: Is still clearly visible. A system of rectilinear city streets and land plots, known as the grid plan , has been used for millennia in Asia, Europe, and the Americas. The Indus Valley Civilization built Mohenjo-Daro , Harappa , and other cities on a grid pattern, using ancient principles described by Kautilya , and aligned with the compass points . The ancient Greek city of Priene exemplifies

4726-420: Is the most urban continent, with four-fifths of its population living in cities, including one-fifth of the population said to live in shantytowns ( favelas , poblaciones callampas , etc.). Batam , Indonesia , Mogadishu , Somalia , Xiamen , China , and Niamey , Niger , are considered among the world's fastest-growing cities, with annual growth rates of 5–8%. In general, the more developed countries of

4865-826: Is the seat of the South Korean government . Seoul's history traces back to 18 BC when it was founded by the people of Baekje , one of the Three Kingdoms of Korea. During the Joseon dynasty, Seoul was officially designated as the capital, surrounded by the Fortress Wall of Seoul. In the early 20th century, Seoul was occupied by the Japanese Empire , temporarily renamed " Keijō " ("Gyeongseong" in Korean). The Korean War brought fierce battles, with Seoul changing hands four times and leaving

5004-596: The 2002 FIFA World Cup . Seoul is geographically set in a mountainous and hilly terrain, with Bukhansan positioned on its northern edge. Within the Seoul Capital Area lie five UNESCO World Heritage Sites: Changdeokgung , Hwaseong Fortress , Jongmyo , Namhansanseong , and the Royal Tombs of the Joseon dynasty . Furthermore, Seoul has witnessed a surge in modern architectural development, with iconic landmarks including

5143-691: The Hanja ' 漢 ' (a transliteration of a native Korean word 한 ; han ; lit.  great), which may also refer to the Han people or the Han dynasty in Chinese and is associated with 'China' in Japanese context. After World War II and the liberation of Korea , Seoul became the official name for the Korean capital. The Standard Korean Language Dictionary still acknowledges both common and proper noun definitions of seoul . Unlike most place names in Korea, as it

5282-716: The N Seoul Tower , the 63 Building , the Lotte World Tower , the Dongdaemun Design Plaza , Lotte World , the Trade Tower , COEX , IFC Seoul , and Parc1 . Seoul was named the World Design Capital in 2010 and has served as the national hub for the music, entertainment, and cultural industries that have propelled K-pop and the Korean Wave to international prominence. Traditionally, seoul ( 서울 ) has been

5421-586: The Republic of Venice and the Republic of Genoa . In Northern Europe, cities including Lübeck and Bruges formed the Hanseatic League for collective defense and commerce. Their power was later challenged and eclipsed by the Dutch commercial cities of Ghent , Ypres , and Amsterdam . Similar phenomena existed elsewhere, as in the case of Sakai , which enjoyed considerable autonomy in late medieval Japan. In

5560-618: The Second Sino-Japanese War , Yeongdeungpo District was annexed into Seoul on April 1, 1936, to function as an industrial complex for steel and other metalworking factories. The city was liberated by U.S. forces at the end of World War II . In 1945, following the liberation from Japanese colonial rule, the American military assumed control of Korea, including its capital city, then referred to as Kyeongseongbu in line with Japanese nomenclature. The U.S. military government published

5699-931: The United Nations ... largely for the purpose of international statistical comparison". The word city and the related civilization come from the Latin root civitas , originally meaning 'citizenship' or 'community member' and eventually coming to correspond with urbs , meaning 'city' in a more physical sense. The Roman civitas was closely linked with the Greek polis —another common root appearing in English words such as metropolis . In toponymic terminology, names of individual cities and towns are called astionyms (from Ancient Greek ἄστυ 'city or town' and ὄνομα 'name'). Urban geography deals both with cities in their larger context and with their internal structure. Cities are estimated to cover about 3% of

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5838-722: The United States . African megacities are present in Nigeria , Egypt , South Africa , Angola and the DRC ; European megacities are present in Russia , France , the United Kingdom , and Turkey (also in Asia ); megacities can be found in Latin America in the countries of Brazil, Mexico , Colombia , Peru , and Argentina . Some sources identify the Greater Tokyo Area as the largest megacity in

5977-501: The Uruk period . In the fourth and third millennium BC , complex civilizations flourished in the river valleys of Mesopotamia , India , China , and Egypt . Excavations in these areas have found the ruins of cities geared variously towards trade, politics, or religion. Some had large, dense populations , but others carried out urban activities in the realms of politics or religion without having large associated populations. Among

6116-451: The atmosphere of chemicals , particulate matter , or biological materials that cause harm or discomfort to humans or other living organisms, or damages the natural environment . Many urban areas have significant problems with smog , a type of air pollution derived from vehicle emissions from internal combustion engines and industrial fumes that react in the atmosphere with sunlight to form secondary pollutants that also combine with

6255-716: The civilization of Djenne-Djenno was likely established by the Mande progenitors of the Bozo people . Their habitation of the site spanned the period from 3rd century BCE to 13th century CE. Archaeological evidence from Jenné-Jeno, specifically the presence of non-West African glass beads dated from the third century BCE to the fourth century CE, indicates that pre-Arabic trade contacts probably existed between Jenné-Jeno and North Africa. Additionally, other early urban centers in West Africa, dated to around 500 CE, include Awdaghust , Kumbi Saleh ,

6394-730: The commune ( in France and Chile ; or comune in Italy). Seoul Seoul , officially Seoul Special Metropolitan City , is the capital and largest city of South Korea . The broader Seoul Capital Area , encompassing Gyeonggi Province and Incheon , emerged as the world's sixth largest metropolitan economy in 2022, trailing behind Paris , San Francisco , Los Angeles , Tokyo , and New York , and hosts more than half of South Korea's population. Although Seoul's population peaked at over 10 million, it has gradually decreased since 2014, standing at about 9.6 million residents as of 2024. Seoul

6533-427: The government workers . (This arrangement contrasts with the more typically horizontal relationships in a tribe or village accomplishing common goals through informal agreements between neighbors, or the leadership of a chief.) The governments may be based on heredity, religion, military power, work systems such as canal-building, food distribution, land-ownership, agriculture, commerce, manufacturing, finance, or

6672-530: The knowledge economy . A new smart city paradigm, supported by institutions such as the RAND Corporation and IBM , is bringing computerized surveillance , data analysis, and governance to bear on cities and city dwellers. Some companies are building brand-new master-planned cities from scratch on greenfield sites. Urbanization is the process of migration from rural to urban areas, driven by various political, economic, and cultural factors. Until

6811-556: The service economy and public-private partnerships , with concomitant gentrification , uneven revitalization efforts , and selective cultural development. Under the Great Leap Forward and subsequent five-year plans continuing today, China has undergone concomitant urbanization and industrialization and become the world's leading manufacturer . Amidst these economic changes, high technology and instantaneous telecommunication enable select cities to become centers of

6950-666: The world population now lives in cities, which has had profound consequences for global sustainability . Present-day cities usually form the core of larger metropolitan areas and urban areas —creating numerous commuters traveling toward city centres for employment, entertainment, and education. However, in a world of intensifying globalization , all cities are to varying degrees also connected globally beyond these regions. This increased influence means that cities also have significant influences on global issues , such as sustainable development , climate change , and global health . Because of these major influences on global issues,

7089-535: The " Global North " remain more urbanized than the less developed countries of the " Global South "—but the difference continues to shrink because urbanization is happening faster in the latter group. Asia is home to by far the greatest absolute number of city-dwellers: over two billion and counting. The UN predicts an additional 2.5 billion city dwellers (and 300 million fewer country dwellers) worldwide by 2050, with 90% of urban population expansion occurring in Asia and Africa. Megacities , cities with populations in

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7228-539: The "functional definition", a city is not distinguished by size alone, but also by the role it plays within a larger political context. Cities serve as administrative, commercial, religious, and cultural hubs for their larger surrounding areas. The presence of a literate elite is often associated with cities because of the cultural diversities present in a city. A typical city has professional administrators , regulations, and some form of taxation (food and other necessities or means to trade for them) to support

7367-486: The 17th century. Thus, the Joseon capital of Hanseong was widely referred to as the seoul. Due to its common usage, French missionaries called the Joseon capital Séoul (/se.ul/) in their writings, hence the common romanization Seoul in various languages today. Under subsequent Japanese colonization , Hanseong was renamed as Keijō (京城, literally 'capital city') by the Imperial authorities to prevent confusion with

7506-524: The 18th century), Ile-Ifẹ̀ (70,000 to 105,000 inhabitants in the 14th and 15th centuries), Niani (50,000 inhabitants in 1400 AD) and Timbuktu (100,000 inhabitants in 1450 AD). In the West, nation-states became the dominant unit of political organization following the Peace of Westphalia in the seventeenth century. Western Europe's larger capitals (London and Paris) benefited from the growth of commerce following

7645-420: The 18th century, an equilibrium existed between the rural agricultural population and towns featuring markets and small-scale manufacturing. With the agricultural and industrial revolutions urban population began its unprecedented growth, both through migration and demographic expansion . In England , the proportion of the population living in cities jumped from 17% in 1801 to 72% in 1891. In 1900, 15% of

7784-403: The 1960s, urbanization also accelerated and workers began to move to Seoul and other larger cities. In 1963, Seoul went through two major expansions that established the shape and size of the present-day Seoul—barring minor adjustments to the borders later in 1973 and 2000. In August 1963, Seoul annexed parts of Yangju-gun , Gwangju-gun , Siheung-gun , Gimpo-gun , and Bucheon-gun , expanding

7923-549: The 1988 Summer Olympics, is the largest park. The areas near the stream Tancheon are popular for exercise. Cheonggyecheon also has spaces for recreation. In 2017 the Seoullo 7017 Skypark opened, spanning diagonally overtop Seoul Station. There are also many parks along the Han River , such as Ichon Hangang Park, Yeouido Hangang Park, Mangwon Hangang Park, Nanji Hangang Park, Banpo Hangang Park, Ttukseom Hangang Park and Jamsil Hangang Park. The Seoul National Capital Area also contains

8062-698: The 30th and 18th centuries BC. Mesoamerica saw the rise of early urbanism in several cultural regions, beginning with the Olmec and spreading to the Preclassic Maya , the Zapotec of Oaxaca, and Teotihuacan in central Mexico. Later cultures such as the Aztec , Andean civilizations , Mayan , Mississippians , and Pueblo peoples drew on these earlier urban traditions. Many of their ancient cities continue to be inhabited, including major metropolitan cities such as Mexico City , in

8201-406: The 5th century. However, according to Samguk sagi , both Baekje and Silla described the land as frontier border of Baekje, not as the capital region. Moreover, Jinheung Taewang Stele found at current day Bukhansan tells that the place was underdeveloped as of 6th century AD, suggesting that the first capital Wiryeseong was not located in or nearby Seoul. In July or August 553, Silla took

8340-722: The 9th through the end of the 12th century, Constantinople , the capital of the Eastern Roman Empire , was the largest and wealthiest city in Europe, with a population approaching 1 million. The Ottoman Empire gradually gained control over many cities in the Mediterranean area, including Constantinople in 1453 . In the Holy Roman Empire , beginning in the 12th century, free imperial cities such as Nuremberg , Strasbourg , Frankfurt , Basel , Zürich , and Nijmegen became

8479-552: The Andes, the first urban centers developed in the Norte Chico civilization , Chavin and Moche cultures, followed by major cities in the Huari , Chimu , and Inca cultures. The Norte Chico civilization included as many as 30 major population centers in what is now the Norte Chico region of north-central coastal Peru . It is the oldest known civilization in the Americas, flourishing between

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8618-509: The Charter of the City of Seoul in the official gazette on October 10 of the following year. The charter declared Seoul as the name of the city and established it as a municipal corporation . Seoul's status as a municipal corporation mirrored the independent cities in the United States that do not belong to any county, and Seoul was established as an independent administrative unit, separate from

8757-519: The Great founded and created them with zeal. Jericho and Çatalhöyük , dated to the eighth millennium BC , are among the earliest proto-cities known to archaeologists. However, the Mesopotamian city of Uruk from the mid-fourth millennium BC (ancient Iraq) is considered by most archaeologists to be the first true city, innovating many characteristics for cities to follow, with its name attributed to

8896-571: The Improvement of Air Quality in the Seoul Metropolitan Area" was passed in December 2003. Its 1st Seoul Metropolitan Air Quality Improvement Plan (2005–2014) focused on improving the concentrations of PM10 and nitrogen dioxide by reducing emissions. As a result, the annual average PM10 concentrations decreased from 70.0 μg/m in 2001 to 44.4 μg/m in 2011 and 46 μg/m in 2014. As of 2014,

9035-619: The North Koreans in the June 1950 First Battle of Seoul , recaptured by UN forces in the September 1950 Second Battle of Seoul , falling to a combined Chinese-North Korean force in the January 1951 Third Battle of Seoul , and finally being recaptured once more by UN forces in Operation Ripper during the spring of 1951. The extensive fighting left the city heavily damaged after the war. The capital

9174-557: The Seoul Capital Area, which has major technology hubs, such as Gangnam and Digital Media City. Seoul is ranked seventh in the Global Power City Index and the Global Financial Centres Index , and is one of the five leading hosts of global conferences. The city has also hosted major events such as the 1986 Asian Games , the 1988 Summer Olympics , and the 2010 G20 Seoul summit , in addition to three matches at

9313-700: The U.S. military government between 1945 and 1948 was much smaller than it is today. It only covered the Fortress Wall , marked by the Eight Gates , and the districts incorporated during Japanese rule to prosecute imperial Japan's war efforts. During the Korean War , Seoul changed hands between the Soviet- and Chinese-backed North Korean forces and the American-backed South Korean forces four times: falling to

9452-491: The absolute number of slum dwellers is rising. The majority of these are located in informal settlements which often lack sufficient quality housing, sanitation, drainage, water access, and officially recognized addresses. The increase in informal settlement population has been caused by massive migration, both internal and transnational, into cities, which has caused growth rates of urban populations and spatial concentrations not seen before in history. These issues raise problems in

9591-475: The ancient capital of Ghana, and Maranda , a center located on a trade route between Egypt and Gao. The dissolution of the Roman Empire in the West was connected with profound changes in urban fabric of western Europe. In places where Roman administration quickly weakened urbanism went through a profound crisis, even if it continued to remain an important symbolic factor. In regions like Italy or Spain cities diminished in size but nevertheless continued to play

9730-429: The annual average PM10 concentration was still at least twice than that recommended by the WHO Air Quality Guidelines. The 2nd Seoul Metropolitan Air Quality Improvement Plan (2015–2024) added PM2.5 and ozone to its list of managed pollutants. Investment in air quality improvement between 2007 and 2020 in the order of US$ 9 billion on the part of three key local authorities, namely Gyeonggi, Incheon and Seoul, delivered

9869-524: The annual cost of congestion for each driver was approximately $ 1,000 in very large cities and $ 200 in small cities. Traffic congestion is increasing in major cities and delays are becoming more frequent in smaller cities and rural areas. Urban sprawl , also known as suburban sprawl, is a multifaceted concept, which includes the spreading outwards of a city and its suburbs to its outskirts to low-density, auto-dependent development on rural land, with associated design features that encourage car dependency . As

10008-509: The area of approximately 4 km (2.5 miles) radius surrounding the Fortress Wall (i.e., Outer old Seoul ; 성저십리 ; 城底十里 ). On October 1, 1910, Imperial Japan demoted Seoul as no different than any other city within the Gyeonggi Province . After Imperial Japan's redistricting, Seoul only included the area inside the Fortress Wall and present-day Yongsan District . In the 1930s, as part of Imperial Japan's war efforts leading up to

10147-460: The athletic, artistic, spiritual, and political life of the polis. Rome was the first city that surpassed one million inhabitants. Under the authority of its empire , Rome transformed and founded many cities ( Colonia ), and with them brought its principles of urban architecture, design, and society. In the ancient Americas , early urban traditions developed in the Andes and Mesoamerica . In

10286-407: The benefit of mitigating the urban heat island effect, especially in cities that are in warmer climates. These spaces prevent carbon imbalances, extreme habitat losses, electricity and water consumption, and human health risks. The urban structure generally follows one or more basic patterns: geomorphic, radial, concentric, rectilinear, and curvilinear. The physical environment generally constrains

10425-613: The census in the year 742 recorded in the New Book of Tang , 362,921 families with 1,960,188 persons were counted in Jingzhao Fu (京兆府), the metropolitan area including small cities in the vicinity of Chang'an. The medieval settlement surrounding Angkor , the one-time capital of the Khmer Empire which flourished between the 9th and 15th centuries, could have supported a population of up to one million people. From around 1825 to 1918 London

10564-472: The city Gyeongseong ("Kyongsong" in Korean and " Keijō " in Japanese). The city saw significant transformation under Japanese colonial rule. Imperial Japan removed the city walls, paved roads, and built Western-style buildings. Seoul was deprived of its special status as the capital city and downsized under imperial Japan, compared to the traditional notion among people of the Joseon dynasty that Seoul included

10703-458: The city as the provincial capital. Based on the naming system, the actual name of Han River during this time was likely Namcheon (Nam River) itself or should have the word ending with "cheon" ( 천 ; 川 ) not "gang" ( 강 ; 江 ) nor "su" ( 수 ; 水 ). In addition, "Bukhansan" Jinheung Stele clearly states that Silla had possession of Hanseong (modern day Pyongyang ), thus Bukhansan has to be located north of Hanseong. Modern day Pyongyang

10842-423: The city mostly in ruins. Nevertheless, the city has since undergone significant reconstruction and rapid urbanization. Seoul was rated Asia's most livable city, with the second-highest quality of life globally according to Arcadis in 2015 and a GDP per capita (PPP) of approximately $ 40,000. 15 Fortune Global 500 companies, including industry giants such as Samsung , LG , and Hyundai , are headquartered in

10981-527: The city, often through rescue archaeology . Seoul is first recorded as Wiryeseong, the capital of Baekje (founded in 18 BC) in the northeastern area of modern Seoul. There are several city walls remaining in the area that date from this time. Pungnaptoseong , an earthen wall located southeast Seoul, is widely believed to have been at the main Wiryeseong site. As the Three Kingdoms competed for this strategic region, control passed from Baekje to Goguryeo in

11120-527: The city, goes over these mountains. The city is bordered by eight mountains, as well as the more level lands of the Han River plain and western areas. Seoul has a large quantity of parks. One of the most famous parks is Namsan Park , which offers recreational hiking and views of the downtown Seoul skyline, especially via its N Seoul Tower . Seoul Olympic Park , located in Songpa District and built to host

11259-419: The community leading to an increase in average income, which in turn makes the area more desirable to other wealthier property or business owners, further pushing the living costs up. This process also tends to lead to a decrease in average family size in the area. This type of population change reduces industrial land use when it is redeveloped for commerce and housing. Air pollution is the introduction into

11398-536: The control of the region from Baekje, and the city became a part of newly established Sin Province ( 신주 ; 新州 ). Sin (新) has both meaning of "New" and "Silla", thus literally means New Silla Province. In November 555, Jinheung Taewang made a royal visit to Bukhansan, and inspected the frontier. In 557, Silla abolished Sin Province, and established Bukhansan Province ( 북한산주 ; 北漢山州 ). The word Hanseong ( 한성 ; 漢城 ; lit.  Han Fortress) appears on

11537-417: The country and according to satellite data, the persistent carbon dioxide anomaly over the city is one of the strongest in the world. Air quality is monitored by geo-stationary satellite measurements centred on Korea and its immediate neighbours. In January 2024 Seoul Metro , whose passengers at the time numbered approximately 7 million a day, announced plans for extensive pollution reduction measures across

11676-514: The current Ichon-dong , the Banpo apartment complex , Apgujeong-dong and Jamsil-dong . Until 1972, Seoul was claimed by North Korea as its de jure capital, being specified as such in Article 103 of the 1948 North Korean constitution . Seoul was the host city of the 1986 Asian Games and 1988 Summer Olympics as well as one of the venues of the 2002 FIFA World Cup . South Korea's 2019 population

11815-453: The early 1990s, the reasons being the high costs of living, urban sprawling to Gyeonggi region's satellite bed cities and an aging population. As of 2016, the number of foreigners living in Seoul was 404,037, 22.9% of the total foreign population in South Korea. As of June 2011, 186,631 foreigners were Chinese citizens of Korean ancestry. This was an 8.84% increase from the end of 2010 and

11954-536: The early Old World cities, Mohenjo-daro of the Indus Valley civilization in present-day Pakistan , existing from about 2600 BC, was one of the largest, with a population of 50,000 or more and a sophisticated sanitation system . China's planned cities were constructed according to sacred principles to act as celestial microcosms . The Ancient Egyptian cities known physically by archaeologists are not extensive. They include (known by their Arab names) El Lahun ,

12093-479: The emergence of an Atlantic trade. However, most towns remained small. During the Spanish colonization of the Americas, the old Roman city concept was extensively used. Cities were founded in the middle of the newly conquered territories and were bound to several laws regarding administration, finances, and urbanism. The growth of the modern industry from the late 18th century onward led to massive urbanization and

12232-476: The existing provinces. The Korean version of the Charter translated " municipal corporation " as " special free city " ( 특별자유시 ; 特別自由市 ), which later became special metropolitan city (or special metropolitan city; 특별시 ) in the Local Autonomy Act of 1949  [ ko ] . Seoul has retained its status as the only special metropolitan city in South Korea (i.e., 서울특별시 ). The City of Seoul

12371-791: The first millennium AD, the Khmer capital of Angkor in Cambodia grew into the most extensive preindustrial settlement in the world by area, covering over 1,000 km and possibly supporting up to one million people. West Africa already had cities before the Common Era , but the consolidation of Trans-Saharan trade in the Middle Ages multiplied the number of cities in the region, as well as making some of them very populous, notably Gao (72,000 inhabitants in 800 AD), Oyo-Ile (50,000 inhabitants in 1400 AD, and may have reached up to 140,000 inhabitants in

12510-440: The form in which a city is built. If located on a mountainside, urban structures may rely on terraces and winding roads. It may be adapted to its means of subsistence (e.g. agriculture or fishing). And it may be set up for optimal defense given the surrounding landscape. Beyond these "geomorphic" features, cities can develop internal patterns, due to natural growth or to city planning . In a radial structure, main roads converge on

12649-507: The fortress), and areas 10 Ri (Korean mile) around the Fortress Wall, which were named as Seongjeosimni ( Korean :  성저십리 ; Hanja :  城底十里 ; lit.  10 Ris around the fortress). The Doseong-an area later gained the informal but popular name Sadaemun-an ( 사대문 안 ), which literally means 'areas inside of the Four Great Gates ', and became the one and only downtown (city center) of Hanyang city . In

12788-479: The functions that are handled by city governments in other jurisdictions. Each gu is divided into " dong " ( 동 ; 洞 ), or neighborhoods. Some gu have only a few dong s while others like Jongno District have a very large number of distinct neighborhoods. Seoul has 423 administrative dongs ( 행정동 ) in total. Seoul proper is noted for its population density , which is almost twice that of New York City and eight times greater than Rome . Its metropolitan area

12927-587: The government to Ravenna and Rome's population declined to a mere 20,000 during the Early Middle Ages , reducing the sprawling city to groups of inhabited buildings interspersed among large areas of ruins and vegetation. Baghdad was likely the largest city in the world from shortly after its foundation in 762 AD until the 930s, with some estimates putting its population at over one million. Chinese capital cities Chang'an and Kaifeng also experienced huge population booms during prosperous empires. According to

13066-408: The high (75–85%) urbanization levels of North America and Western Europe . Since the 2000s, the largest megacity has been the Greater Tokyo Area . The population of this urban agglomeration includes areas such as Yokohama and Kawasaki , and is estimated to be between 37 and 38 million. This variation in estimates can be accounted for by different definitions of what the area encompasses. While

13205-405: The historic Hànchéng to Shǒu'ěr ( 首尔 ; 首爾 ). Shǒu'ěr is a phono-semantic match incorporating both sound and meaning (through 首 meaning 'head', 'chief', 'first'). There is evidence of human habitation in the area now corresponding to Seoul from 30,000 to 40,000 years before the present. Around 4,000 B.C., people of the area lived in huts with lowered floors called umjip ( 움집 ). There

13344-585: The hottest month, has average high and low temperatures of 30.0 and 22.9 °C (86 and 73 °F) with higher temperatures possible. Heat index values can surpass 40 °C (104.0 °F) at the height of summer. Winters are usually cold to freezing with average January high and low temperatures of 2.1 and −5.5 °C (35.8 and 22.1 °F), and are generally much drier than summers, with an average of 24.9 days of snow annually. Sometimes, temperatures drop dramatically to below −10 °C (14 °F), and on some occasions as low as −15 °C (5 °F) in

13483-800: The international community has prioritized investment in sustainable cities through Sustainable Development Goal 11 . Due to the efficiency of transportation and the smaller land consumption , dense cities hold the potential to have a smaller ecological footprint per inhabitant than more sparsely populated areas. Therefore, compact cities are often referred to as a crucial element in fighting climate change. However, this concentration can also have some significant negative consequences, such as forming urban heat islands , concentrating pollution , and stressing water supplies and other resources. A city can be distinguished from other human settlements by its relatively great size, but also by its functions and its special symbolic status , which may be conferred by

13622-468: The land surface of the Earth. Town siting has varied through history according to natural, technological, economic, and military contexts. Access to water has long been a major factor in city placement and growth, and despite exceptions enabled by the advent of rail transport in the nineteenth century, through the present most of the world's urban population lives near the coast or on a river. Urban areas as

13761-594: The late 19th century, after hundreds of years of isolation, Seoul opened its gates to foreigners and began modernization. Seoul became the first city in East Asia to introduce electricity in the royal palace, which was established by the Edison Illuminating Company . A decade later the city also implemented electrical street lights. After Gojong 's proclamation of Korea as the Korean Empire in 1897, Seoul

13900-444: The least-urbanized continents, Asia and Africa . Surveys and projections indicate that all urban growth over the next 25 years will be in developing countries . One billion people, almost one-seventh of the world's population, now live in shanty towns . In many poor countries, overcrowded slums exhibit high rates of disease due to unsanitary conditions, malnutrition, and lack of basic health care. By 2030, over 2 billion people in

14039-475: The longest continual inhabitation . Cities, characterized by population density , symbolic function, and urban planning , have existed for thousands of years. In the conventional view, civilization and the city were both followed by the development of agriculture , which enabled the production of surplus food and thus a social division of labor (with concomitant social stratification ) and trade . Early cities often featured granaries , sometimes within

14178-420: The mid winter period of January and February. Temperatures below −20 °C (−4 °F) have been recorded. The Seoul Metropolitan Government is the local government for Seoul, and is responsible for the administration and provision of various services to the city, including correctional institutions, education, libraries, public safety, recreational facilities, sanitation, water supply, and welfare services. It

14317-492: The multi-millions, have proliferated into the dozens, arising especially in Asia, Africa, and Latin America. Economic globalization fuels the growth of these cities, as new torrents of foreign capital arrange for rapid industrialization, as well as the relocation of major businesses from Europe and North America, attracting immigrants from near and far. A deep gulf divides the rich and poor in these cities, which usually contain

14456-550: The network. The target was to cut pollution to over 30% below the legal limit of 50 μg/m3. It was 32 μg/m3 by 2026. The outset actuality was 38.8 μg/m3 average concentration of pollution.  Starting in 2024, ₩100 billion annually for three years was earmarked for air pollution reduction measures. These included installation of air conditioning, better ventilation systems and filters, replacement of dust-inducing gravel rail tunnel beds with concrete ones, dust-capture matting at turnstiles, and constant public readings for pollution within

14595-624: The northeastern borders of Seoul. In September, Seoul again annexed present-day Gangnam . The two consecutive expansions more than doubled the size of Seoul from approximately 268 km (103 sq mi) to 613 km (237 sq mi). After annexation, Gangnam 's development was spurred by key infrastructure projects: the construction of the Hannam Bridge (1966–1969) and Gyeongbu Expressway (1968–1970). As Seoul's population kept growing, Park 's regime focused its development plans on Gangnam. The main hurdle for Gangnam's development

14734-458: The northern border. The city lost its provincial capital position and was put under Bukhansan Province once again. This further proves that Bukhansan was located in the North of modern-day Pyongyang as changing the provincial name and objective would not be required if Bukhansan was located within Seoul. In the 11th century Goryeo , which succeeded Unified Silla , built a summer palace in Seoul, which

14873-567: The period of the Republic and later of the Empire , Rome was the largest , wealthiest, and most politically important city of the ancient world, rulling over Europe, Western Asia and Northern Africa. It is often stated that its population passed one million people by the end of the 1st century BC, however, its sometimes debated about whether the population actually reached such a large size. Rome's population started declining in 402 AD when Flavius Honorius , Western Roman Emperor from 395 to 423, moved

15012-598: The political, social, and economic arenas. People who live in slums or informal settlements often have minimal or no access to education, healthcare, or the urban economy. As with any large concentration of people, there is usually crime. High population densities often result in higher crime rates, as visibly seen in growing megacities such as Karachi , Delhi , Cairo , Rio de Janeiro , and Lagos . Megacities often have significant numbers of homeless people. The actual legal definition of homelessness varies from country to country, or among different entities or institutions in

15151-582: The populations. Another list defines megacities as urban agglomerations instead of metropolitan areas. As of 2021, there are 28 megacities by this definition, like Tokyo. Other sources list Nagoya and the Rhein-Ruhr as megacities. According to the United Nations, the proportion of urban dwellers living in slums or informal settlements decreased from 47 percent to 37 percent in the developing world between 1990 and 2005. However, due to rising population,

15290-601: The prefectures of Tokyo , Chiba , Kanagawa , and Saitama are commonly included in statistical information, the Japan Statistics Bureau only includes the area within 50 kilometers of the Tokyo Metropolitan Government Offices in Shinjuku , thus arriving at a smaller population estimate. A characteristic issue of megacities is the difficulty in defining their outer limits and accurately estimating

15429-582: The primary emissions to form photochemical smog . The sheer size and complexity of megacities gives rise to enormous social and environmental challenges. Whether megacities can develop sustainably depends to a large extent on how they obtain, share, and manage their energy and material resources. There are correlations between electricity consumption , heating and industrial fuel use, ground transportation energy use, water consumption , waste generation , and steel production in terms of level of consumption and how efficiently they use resources. Megacities are

15568-500: The public as well as forms of public land such as public domain and the commons . Western philosophy since the time of the Greek agora has considered physical public space as the substrate of the symbolic public sphere . Public art adorns (or disfigures) public spaces. Parks and other natural sites within cities provide residents with relief from the hardness and regularity of typical built environments . Urban green spaces are another component of public space that provides

15707-810: The rise of new great cities, first in Europe and then in other regions, as new opportunities brought huge numbers of migrants from rural communities into urban areas. England led the way as London became the capital of a world empire and cities across the country grew in locations strategic for manufacturing . In the United States from 1860 to 1910, the introduction of railroads reduced transportation costs, and large manufacturing centers began to emerge, fueling migration from rural to city areas. Some industrialized cities were confronted with health challenges associated with overcrowding , occupational hazards of industry, contaminated water and air, poor sanitation , and communicable diseases such as typhoid and cholera . Factories and slums emerged as regular features of

15846-468: The same country or region. In 2002, research showed that children and families were the largest growing segment of the homeless population in the United States, and this has presented new challenges, especially in services, to agencies. In the US, the government asked many major cities to come up with a ten-year plan to end homelessness. One of the results of this was a " Housing first " solution, rather than to have

15985-680: The same location as Tenochtitlan ; while ancient continuously inhabited Pueblos are near modern urban areas in New Mexico , such as Acoma Pueblo near the Albuquerque metropolitan area and Taos Pueblo near Taos ; while others like Lima are located nearby ancient Peruvian sites such as Pachacamac . From 1600 BC, Dhar Tichitt , in the south of present-day Mauritania , presented characteristics suggestive of an incipient form of urbanism. The second place to show urban characteristics in West Africa

16124-446: The same period fell by 19% across the country and more in Seoul and Gyeonggi. Asian dust , emissions from Seoul and in general from the rest of South Korea, as well as emissions from China, all contribute to Seoul's air quality. Besides air quality, greenhouse gas emissions represent hot issues in South Korea since the country is among top-10 strongest emitters in the world. Seoul is the strongest hotspot of greenhouse gas emissions in

16263-663: The stone wall of "Pyongyang Fortress", which was presumably built in the mid to late 6th century AD over period of 42 years, located in Pyongyang, while there is no evidence that Seoul had name Hanseong dating the three kingdoms and earlier period. In 568, Jinheung Taewang made another royal visit to the northern border, visited Hanseong, and stayed in Namcheon on his way back to the capital. During his stay, he set Jinheung Taewang Stele, abolished Bukhansan Province, and established Namcheon Province (남천주; 南川州; South River Province), appointing

16402-557: The surrounding metropolitan regions following a massive earthquake in 2010. Fictional planet-wide megacities ( ecumenopoleis ) include Trantor in Isaac Asimov 's Foundation series of books and Coruscant (population two trillion) in the Star Wars universe. City Historically, city dwellers have been a small proportion of humanity overall, but following two centuries of unprecedented and rapid urbanization , more than half of

16541-523: The system. Seoul has a humid continental ( Köppen : Dwa ) or humid subtropical climate ( Cwa , by −3 °C or 26.6 °F isotherm), influenced by the monsoons ; there is great variation in temperature and precipitation throughout the year. The suburbs of Seoul are generally cooler than the center of Seoul because of the urban heat island effect. Summers are hot and humid, with the East Asian monsoon taking place from June until September. August,

16680-441: The term and has challenged geographers seeking to classify territories according to an urban-rural binary. Metropolitan areas include suburbs and exurbs organized around the needs of commuters , and sometimes edge cities characterized by a degree of economic and political independence. (In the US these are grouped into metropolitan statistical areas for purposes of demography and marketing .) Some cities are now part of

16819-550: The term was coined by urbanist Janice Perlman referring to the phenomenon of very large urban agglomerations. In 1800, only 3% of the world's population lived in cities, a figure that rose to 47% by the end of the twentieth century. In 1950, there were 83 cities with populations exceeding one million; by 2007, this number had risen to 468. The UN forecasts that today's urban population of 3.2 billion will rise to nearly 5 billion by 2030, when three out of five, or 60%, of people will live in cities. This increase will be most dramatic on

16958-412: The turn of the first millennium BC , encompassed numerous cities extending from Tyre , Cydon , and Byblos to Carthage and Cádiz . In the following centuries, independent city-states of Greece , especially Athens , developed the polis , an association of male landowning citizens who collectively constituted the city. The agora , meaning "gathering place" or "assembly", was the center of

17097-446: The urban landscape. In the second half of the 20th century, deindustrialization (or " economic restructuring ") in the West led to poverty , homelessness , and urban decay in formerly prosperous cities. America's "Steel Belt" became a " Rust Belt " and cities such as Detroit , Michigan, and Gary, Indiana began to shrink , contrary to the global trend of massive urban expansion. Such cities have shifted with varying success into

17236-575: The volume of sewage begins to exceed manageable levels. The local government of cities takes different forms including prominently the municipality (especially in England , in the United States , India , and other British colonies ; legally, the municipal corporation ; municipio in Spain and Portugal , and, along with municipalidad , in most former parts of the Spanish and Portuguese empires) and

17375-673: The world will be living in slums . Over 90% of the urban population of Ethiopia , Malawi and Uganda , three of the world's most rural countries, already live in slums. By 2025, Asia alone will have at least 30 megacities, including Mumbai , India (2015 population of 20.75 million people), Shanghai , China (2015 population of 35.5 million people), Delhi , India (2015 population of 21.8 million people), Tokyo , Japan (2015 population of 38.8 million people) and Seoul , South Korea (2015 population of 25.6 million people). In Africa, Lagos , Nigeria has grown from 300,000 in 1950 to an estimated 21 million today. For almost five hundred years, during

17514-512: The world's population lived in cities. The cultural appeal of cities also plays a role in attracting residents. Urbanization rapidly spread across Europe and the Americas and since the 1950s has taken hold in Asia and Africa as well. The Population Division of the United Nations Department of Economic and Social Affairs reported in 2014 that for the first time, more than half of the world population lives in cities. Latin America

17653-569: The world, while some others give the title to the Pearl River Delta in China. The term "megacity" entered common use in the late 19th or early 20th centuries; one of the earliest documented uses of the term was by the University of Texas in 1904. Initially the United Nations used the term to describe cities of 8 million or more inhabitants, but now uses the threshold of 10 million. In the mid 1970s

17792-532: Was Dia , in present-day Mali , from 800 BC. Both Dhar Tichitt and Dia were founded by the same people: the Soninke , who would later also found the Ghana Empire . Another ancient site, Jenné-Jeno , in what is today Mali , has been dated to the third century BCE. According to Roderick and Susan McIntosh, Jenné-Jeno did not fit into traditional Western conceptions of urbanity as it lacked monumental architecture and

17931-580: Was 24 micrograms per cubic meter (1.0 × 10  gr/cu ft), which is 2.4 times higher than that recommended by the WHO Air Quality Guidelines for the annual mean PM2.5. The Seoul Metropolitan Government monitors and publicly shares real-time air quality data. Since the early 1960s, the Ministry of Environment has implemented a range of policies and air pollutant standards to improve and manage air quality for its people. The "Special Act on

18070-618: Was also known by other various historical names, such as Bukhansan-gun (북한산군; 北漢山郡, during the Goguryeo era), Namcheon ( 남천 ; 南川 , during the Silla era), Hanyang ( 한양 ; 漢陽 , during the Northern and Southern States period ), Namgyeong (남경; 南京, during the Goryeo era), and Hanseong ( 한성 ; 漢城 , during the Joseon era). The word seoul was used colloquially to refer to the capital as early as

18209-497: Was estimated at 51.71 million, and according to the 2018 Population and Housing Census, 49.8% of the population resided in the Seoul metropolitan area. This was up by 0.7% from 49.1% in 2010, showing a distinct trend toward the concentration of the population in the capital. Seoul has become the economic, political and cultural hub of the country, with several Fortune Global 500 companies, including Samsung , SK Holdings , Hyundai , POSCO and LG Group headquartered there. Seoul

18348-408: Was floods because the area is low-lying and prone to flooding. Then Seoul mayor Kim Hyun-ok ordered construction of an expressway that doubled as embankment , which became the present-day Gangbyeon Expressway . The construction started in March 1967 and completed in September of the same year. Similar projects transformed previously flood-prone areas into usable land for development. Such areas include

18487-505: Was not Pyongyang, Taedong River was likely Han River, and Bukhansan was not Bukhansan during the three kingdoms period. Moreover, Pyongyang was a common noun meaning capital used by Goguryeo and Goryeo dynasties, similar to Seoul. In 603, Goguryeo attacked Bukhansanseong (북한산성; 北漢山城; Bukhan Mountain Fortress), which Silla ended up winning. In 604, Silla abolished Namcheon Province, and reestablished Bukhansan Province in order to strengthen

18626-477: Was partially finished around 1396. The city of Hanyang was governed by the Hanseongbu  [ ko ] ( 한성부 ), an agency of the national government dedicated to affairs on the administration of the capital city. The Hanseongbu divided Hanyang into two major categories: areas inside the Fortress Wall, which were typically named Seong-jung ( 성중 ; 城中 ) or Doseong-an ( 도성 안 ; lit.  Inside

18765-408: Was referred to as the "Southern Capital". It was only from this period that Seoul became a larger settlement. Seoul became the planned capital of Korea by Yi Seong-gye , the founding father of the Joseon dynasty. After enthroning himself as King at the capital of old Goryeo in 1392, Yi Seong-gye changed the name of his Kingdom from Goryeo to Joseon in 1393 and began his search for a place for

18904-514: Was temporarily called Hwangseong ( 황성 ; 皇城 ; lit.  the imperial city). Much of modern development around this era was propelled by trade with foreign countries like France and the United States. For example, the Seoul Electric Company , Seoul Electric Trolley Company, and Seoul Fresh Spring Water Company were all joint Korean–U.S. owned enterprises. After the annexation treaty in 1910, Japan annexed Korea and renamed

19043-486: Was temporarily relocated to Busan . One estimate of the extensive damage states that after the war, at least 191,000 buildings, 55,000 houses, and 1,000 factories lay in ruins. In addition, a flood of refugees had entered Seoul during the war, swelling the population of the city and its metropolitan area to an estimated 1.5 million by 1955. Following the war, Seoul began to focus on reconstruction and modernization. As South Korea's economy started to grow rapidly from

19182-419: Was the largest city in the world, with the population growing rapidly; it was the first city to reach a population of over 5 million in 1900. In 1950, New York City was the only urban area with a population of over 10 million. Geographers had identified 25 such areas as of October 2005, as compared with 19 megacities in 2004 and only nine in 1985. This increase has happened as the world's population moves towards

19321-434: Was the most densely populated among OECD countries in Asia in 2012, and second worldwide after that of Paris . As of the end of June 2011, 10.29 million Republic of Korea citizens lived in the city. This was a 0.24% decrease from the end of 2010. The population was 10.44 million in 2012, and 9.86 million in 2015. As of 2021, Seoul's population is 9.59 million. The population of Seoul has been dropping since

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