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125-617: Sheikh Ali Bin Khalid Al-Thani (born September 1, 1982) is a Qatari equestrian . He competed at the 2016 Summer Olympics in the individual jumping event, in which he placed sixth, and in the team jumping event, in which Qatar's team placed ninth. He was the flag bearer for Qatar at the Parade of Nations . At the 2019 Olympic qualifier in Rabat, Al-Thani tested positive for cannabis . This biographical article related to Qatari equestrianism
250-535: A British protectorate in 1916 and gained independence in 1971. The current emir is Tamim bin Hamad Al Thani , who holds nearly all executive, legislative, and judicial authority in an autocratic manner under the Constitution of Qatar . He appoints the prime minister and cabinet . The partially-elected Consultative Assembly can block legislation and has a limited ability to dismiss ministers. In early 2017,
375-776: A major non-NATO ally of the United States. Qatar also has particularly strong ties with France, China, Iran, Turkey, as well as a number of Islamist movements in the Middle East such as the Muslim Brotherhood . The country is an early member of OPEC and a founding member of the Gulf Cooperation Council , as well as a member of the Arab League . Diplomatic missions to Qatar are based in its capital, Doha. Regional relations and foreign policies are characterized by
500-417: A perfect fourth ) and octaves . Ptolemy reviewed standard (and ancient, disused ) musical tuning practice of his day, which he then compared to his own subdivisions of the tetrachord and the octave , which he derived experimentally using a monochord / harmonic canon. The volume ends with a more speculative exposition of the relationships between harmony, the soul ( psyche ), and the planets ( harmony of
625-414: A 10-year sentence. Alcohol consumption is partially legal; some five-star luxury hotels are allowed to sell alcohol to non-Muslim customers. Muslims are not allowed to consume alcohol, and those caught consuming it are liable to flogging or deportation. Non-Muslim expatriates can obtain a permit to purchase alcohol for personal consumption. The Qatar Distribution Company (a subsidiary of Qatar Airways )
750-578: A British protectorate on 3 November 1916 when the United Kingdom signed a treaty with Sheikh Abdullah bin Jassim Al Thani to bring Qatar under its Trucial System of Administration . The treaty reserved foreign affairs and defence to the United Kingdom but allowed internal autonomy. While Abdullah agreed not to enter into any relations with any other power without the prior consent of the British government,
875-558: A Roman Catholic church (2008). Qatar's economy and status as a regional power rapidly grew in the 2000s. According to the UN, the nation's economic growth, measured by GDP, was the fastest in the world during this decade. The basis of this growth lay in the exploitation of natural gas in the North Field during the 1990s. At the same time, the population tripled between 2001 and 2011, mostly from an influx of foreigners. In 2003, Qatar served as
1000-601: A Roman citizen, but was ethnically either a Greek or at least a Hellenized Egyptian. Astronomy was the subject to which Ptolemy devoted the most time and effort; about half of all the works that survived deal with astronomical matters, and even others such as the Geography and the Tetrabiblos have significant references to astronomy. Ptolemy's Mathēmatikē Syntaxis ( Greek : Μαθηματικὴ Σύνταξις , lit. ' Mathematical Systematic Treatise ' ), better known as
1125-618: A certain Syrus, a figure of whom almost nothing is known but who likely shared some of Ptolemy's astronomical interests. Ptolemy died in Alexandria c. 168 . Ptolemy's Greek name , Ptolemaeus ( Πτολεμαῖος , Ptolemaîos ), is an ancient Greek personal name . It occurs once in Greek mythology and is of Homeric form . It was common among the Macedonian upper class at the time of Alexander
1250-470: A coherent mathematical description, which persists to the present as just intonation – the standard for comparison of consonance in the many other, less-than exact but more facile compromise tuning systems. During the Renaissance , Ptolemy's ideas inspired Kepler in his own musings on the harmony of the world ( Harmonice Mundi , Appendix to Book V). The Optica ( Koine Greek : Ὀπτικά ), known as
1375-529: A dispute over Qatar's support of the Muslim Brotherhood , which is considered a terrorist organization by some Arab nations. The diplomatic crisis ended in January 2021 with the signing of AlUla declaration. On 2 October 2020, Qatari authorities strip-searched 13 Australian women on a plane at Hamad International Airport over a premature baby found in a bathroom at the terminal. This caused an international incident with Australia. In September 2023, Qatar mediated
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#17330862618081500-507: A dozen scientific treatises , three of which were important to later Byzantine , Islamic , and Western European science. The first was his astronomical treatise now known as the Almagest , originally entitled Mathematical Treatise ( Greek : Μαθηματικὴ Σύνταξις , Mathēmatikḗ Syntaxis ). The second is the Geography , which is a thorough discussion on maps and the geographic knowledge of
1625-831: A famous horse and camel breeding centre during the Umayyad period. In the 8th century, it started benefiting from its commercially strategic position in the Persian Gulf and went on to become a centre of pearl trading. Substantial development in the pearling industry around the Qatari Peninsula occurred during the Abbasid era. Ships voyaging from Basra to India and China would make stops in Qatar's ports during this period. Chinese porcelain , West African coins, and artefacts from Thailand have been discovered in Qatar. Archaeological remains from
1750-402: A handful of places. Ptolemy's real innovation, however, occurs in the second part of the book, where he provides a catalogue of 8,000 localities he collected from Marinus and others, the biggest such database from antiquity. About 6 300 of these places and geographic features have assigned coordinates so that they can be placed in a grid that spanned the globe. Latitude was measured from
1875-492: A long exposition on the relationship between reason and sense perception in corroborating theoretical assumptions. After criticizing the approaches of his predecessors, Ptolemy argues for basing musical intervals on mathematical ratios (as opposed to the ideas advocated by followers of Aristoxenus ), backed up by empirical observation (in contrast to the excessively theoretical approach of the Pythagoreans ). Ptolemy introduces
2000-537: A mediator, such as for Middle Eastern conflicts; for example, Qatar mediated between the rival Palestinian factions Fatah and Hamas in 2006 and helped unite Lebanese leaders into forming a political agreement during the 2008 crisis. Qatar has also emerged as mediators in African and Asian affairs, notably holding a peace process for Sudan amid the Darfur conflict and facilitating peace talks for Afghanistan , setting up
2125-596: A member of Ptolemaic Egypt's royal lineage , stating that the descendants of the Alexandrine general and Pharaoh Ptolemy I Soter were wise "and included Ptolemy the Wise, who composed the book of the Almagest ". Abu Ma'shar recorded a belief that a different member of this royal line "composed the book on astrology and attributed it to Ptolemy". Historical confusion on this point can be inferred from Abu Ma'shar's subsequent remark: "It
2250-587: A method for specifying the location of the Sun in three pairs of locally oriented coordinate arcs as a function of the declination of the Sun, the terrestrial latitude, and the hour. The key to the approach is to represent the solid configuration in a plane diagram that Ptolemy calls the analemma . In another work, the Phaseis ( Risings of the Fixed Stars ), Ptolemy gave a parapegma , a star calendar or almanac , based on
2375-423: A modesty campaign was launched to remind tourists of the country's restrictive dress code. Female tourists were advised not to wear leggings, miniskirts, sleeveless dresses, or short or tight clothing in public. Men were warned against wearing shorts and singlets. Qatar's international profile and active role in international affairs have led some analysts to identify it as a middle power . Since 2022, it has been
2500-461: A much later pseudepigraphical composition. The identity and date of the actual author of the work, referred to now as Pseudo-Ptolemy , remains the subject of conjecture. Ptolemy wrote a work entitled Harmonikon ( Greek : Ἁρμονικόν ), known as the Harmonics , on music theory and the mathematics behind musical scales in three books. Harmonics begins with a definition of harmonic theory, with
2625-784: A negligible military presence in the area, the Ottomans were expelled by the Bani Khalid tribe and their emirate in 1670. In 1766, members of the Al Khalifa family of the Utub tribal confederation migrated from Kuwait to Zubarah in Qatar. By the time of their arrival, the Bani Khalid exercised weak authority over the peninsula, notwithstanding the fact that the largest village was ruled by their distant kin. In 1783, Qatar-based Bani Utbah clans and allied Arab tribes invaded and annexed Bahrain from
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#17330862618082750-607: A political "office" for the Afghan Taliban to facilitate talks. Ahmed Rashid , writing in the Financial Times , stated that through the office Qatar has "facilitated meetings between the Taliban and many countries and organisations, including the US state department, the UN, Japan, several European governments and non-governmental organisations, all of whom have been trying to push forward
2875-639: A significant portion of eastern Arabia in 1521. In 1550, the inhabitants of Al-Hasa voluntarily submitted to the rule of the Ottomans , preferring them to the Portuguese. After the fall of the Jabrid Dynasty with the conquest of Bahrain by the Portuguese, the Arabian coast up to Al Hassa came under the rule and influence of the Portuguese empire. Attempts by the Ottomans to dominate the region were eliminated with
3000-543: A temple at Canopus , around 146–147 AD, known as the Canobic Inscription . Although the inscription has not survived, someone in the sixth century transcribed it, and manuscript copies preserved it through the Middle Ages. It begins: "To the saviour god, Claudius Ptolemy (dedicates) the first principles and models of astronomy", following by a catalogue of numbers that define a system of celestial mechanics governing
3125-478: A thousand years or more". It was first translated from Arabic into Latin by Plato of Tivoli (Tiburtinus) in 1138, while he was in Spain. Much of the content of the Tetrabiblos was collected from earlier sources; Ptolemy's achievement was to order his material in a systematic way, showing how the subject could, in his view, be rationalized. It is, indeed, presented as the second part of the study of astronomy of which
3250-553: A view supported by the Stoics. Although mainly known for his contributions to astronomy and other scientific subjects, Ptolemy also engaged in epistemological and psychological discussions across his corpus. He wrote a short essay entitled On the Criterion and Hegemonikon ( Greek : Περὶ Κριτηρίου καὶ Ἡγεμονικοῡ ), which may have been one of his earliest works. Ptolemy deals specifically with how humans obtain scientific knowledge (i.e.,
3375-684: Is a high-income economy , backed by the world's third-largest natural gas reserves and oil reserves. Qatar is one of the world's largest exporters of liquefied natural gas and the world's largest emitter of carbon dioxide per capita. In the 21st century, Qatar emerged as both a major non-NATO ally of the United States and a middle power in the Arab world. Its economy has risen rapidly through its resource-wealth, and its geopolitical power has risen through its media group, Al Jazeera Media Network , and reported support for rebel groups financially during
3500-742: Is a stub . You can help Misplaced Pages by expanding it . Qatar Qatar , officially the State of Qatar , is a country in West Asia . It occupies the Qatar Peninsula on the northeastern coast of the Arabian Peninsula in the Middle East ; it shares its sole land border with Saudi Arabia to the south, with the rest of its territory surrounded by the Persian Gulf . The Gulf of Bahrain , an inlet of
3625-493: Is a mixture of civil law and Sharia. Sharia is applied to family law, inheritance, and several criminal acts (including adultery, robbery, and murder). In some cases, Sharia-based family courts treat a female's testimony as being worth half that of a man. Codified family law was introduced in 2006. Islamic polygyny is permitted. Judicial corporal punishment is a punishment in Qatar. Only Muslims considered medically fit are liable to have such sentences carried out. Flogging
3750-468: Is ancestral to the modern system of constellations but, unlike the modern system, they did not cover the whole sky (only what could be seen with the naked eye in the northern hemisphere). For over a thousand years, the Almagest was the authoritative text on astronomy across Europe, the Middle East, and North Africa. The Almagest was preserved, like many extant Greek scientific works, in Arabic manuscripts;
3875-445: Is employed as a punishment for alcohol consumption or illicit sexual relations. Article 88 of the criminal code declares that the penalty for adultery is 100 lashes. Stoning is a legal punishment in Qatar, and apostasy and homosexuality are crimes punishable by the death penalty ; however, the penalty has not been carried out for either crime. Blasphemy can result in up to seven years in prison, while proselytising can incur
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4000-622: Is his Geographike Hyphegesis ( Greek : Γεωγραφικὴ Ὑφήγησις ; lit. ' Guide to Drawing the Earth ' ), known as the Geography , a handbook on how to draw maps using geographical coordinates for parts of the Roman world known at the time. He relied on previous work by an earlier geographer, Marinus of Tyre , as well as on gazetteers of the Roman and ancient Persian Empire . He also acknowledged ancient astronomer Hipparchus for having provided
4125-474: Is made up of 30 popularly-elected members and 15 appointed by the emir. It can block legislation with a simple majority and can dismiss ministers, including the prime minister, with a two-thirds vote. The assembly had its first elections in October 2021 after several postponements. According to Qatar's Constitution, Sharia law is the main source of Qatari legislation, although in practice Qatar's legal system
4250-419: Is permitted to import alcohol and pork; it operates the only liquor store in the country, which also sells pork to holders of liquor licences. Qatari officials had indicated a willingness to allow alcohol in "fan zones" at the 2022 FIFA World Cup. However, on 18 November, two days before the start of the games, Qatari officials announced alcoholic beverages would not be permitted within the stadiums. In 2014,
4375-432: Is quite late, however, and there is no evidence to support it. It is known that Ptolemy lived in or around the city of Alexandria , in the Roman province of Egypt under Roman rule . He had a Latin name, Claudius, which is generally taken to imply he was a Roman citizen . He was familiar with Greek philosophers and used Babylonian observations and Babylonian lunar theory. In half of his extant works, Ptolemy addresses
4500-418: Is sometimes said that the very learned man who wrote the book of astrology also wrote the book of the Almagest . The correct answer is not known." Not much positive evidence is known on the subject of Ptolemy's ancestry, apart from what can be drawn from the details of his name, although modern scholars have concluded that Abu Ma'shar's account is erroneous. It is no longer doubted that the astronomer who wrote
4625-410: Is the 29th most peaceful country in the world, according to the 2024 Global Peace Index . Ptolemy Claudius Ptolemy ( / ˈ t ɒ l ə m i / ; Ancient Greek : Πτολεμαῖος , Ptolemaios ; Latin : Claudius Ptolemaeus ; c. 100 – c. 170 AD) was an Alexandrian mathematician , astronomer , astrologer , geographer , and music theorist who wrote about
4750-633: Is the earliest known site of shellfish dye production, owing to a Kassite purple dye industry which existed on the coast. In 224 AD, the Sasanian Empire gained control over the territories surrounding the Persian Gulf. Qatar played a role in the commercial activity of the Sasanids, contributing at least two commodities: precious pearls and purple dye. Under the Sasanid reign, many of the inhabitants in eastern Arabia were introduced to Christianity following
4875-626: The Almagest also wrote the Tetrabiblos as its astrological counterpart. In later Arabic sources, he was often known as "the Upper Egyptian ", suggesting he may have had origins in southern Egypt . Arabic astronomers , geographers , and physicists referred to his name in Arabic as Baṭlumyus ( Arabic : بَطْلُمْيوس ). Ptolemy wrote in Koine Greek , and can be shown to have used Babylonian astronomical data . He might have been
5000-413: The Almagest , is the only surviving comprehensive ancient treatise on astronomy. Although Babylonian astronomers had developed arithmetical techniques for calculating and predicting astronomical phenomena, these were not based on any underlying model of the heavens; early Greek astronomers, on the other hand, provided qualitative geometrical models to "save the appearances" of celestial phenomena without
5125-504: The gens Claudia ; the peculiar multipart form of the whole name Claudius Ptolemaeus is a Roman custom, characteristic of Roman citizens. This indicates that Ptolemy would have been a Roman citizen . Gerald Toomer, the translator of Ptolemy's Almagest into English, suggests that citizenship was probably granted to one of Ptolemy's ancestors by either the emperor Claudius or the emperor Nero . The 9th century Persian astronomer Abu Ma'shar al-Balkhi mistakenly presents Ptolemy as
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5250-662: The Almagest was the first, concerned with the influences of the celestial bodies in the sublunary sphere . Thus explanations of a sort are provided for the astrological effects of the planets , based upon their combined effects of heating, cooling, moistening, and drying. Ptolemy dismisses other astrological practices, such as considering the numerological significance of names, that he believed to be without sound basis, and leaves out popular topics, such as electional astrology (interpreting astrological charts to determine courses of action) and medical astrology , for similar reasons. The great respect in which later astrologers held
5375-569: The Arab Spring . Qatar also forms part of the Gulf Cooperation Council . Pliny the Elder , a Roman writer, documented the earliest account pertaining to the inhabitants of the peninsula around the mid-first century AD, referring to them as the Catharrei , a designation that may have derived from the name of a prominent local settlement. A century later, Ptolemy produced the first known map to depict
5500-410: The Geography is likely to be of different dates, in addition to containing many scribal errors. However, although the regional and world maps in surviving manuscripts date from c. 1300 AD (after the text was rediscovered by Maximus Planudes ), there are some scholars who think that such maps go back to Ptolemy himself. Ptolemy wrote an astrological treatise, in four parts, known by
5625-749: The Greco-Roman world . The third is the astrological treatise in which he attempted to adapt horoscopic astrology to the Aristotelian natural philosophy of his day. This is sometimes known as the Apotelesmatika ( Greek : Αποτελεσματικά , lit. ' On the Effects ' ) but more commonly known as the Tetrábiblos , from the Koine Greek meaning "Four Books", or by its Latin equivalent Quadripartite . The Catholic Church promoted his work, which included
5750-784: The Optics, is a work that survives only in a somewhat poor Latin version, which, in turn, was translated from a lost Arabic version by Eugenius of Palermo ( c. 1154 ). In it, Ptolemy writes about properties of sight (not light), including reflection , refraction , and colour . The work is a significant part of the early history of optics and influenced the more famous and superior 11th-century Book of Optics by Ibn al-Haytham . Ptolemy offered explanations for many phenomena concerning illumination and colour, size, shape, movement, and binocular vision. He also divided illusions into those caused by physical or optical factors and those caused by judgmental factors. He offered an obscure explanation of
5875-799: The Qatari Emiri Land Forces , 2,500 in the Navy , 2,000 in the Air Force , and 5,000 in the Internal Security Forces. In 2008 Qatar spent US$ 2.3 billion on its military, which was 2.3% of the GDP, and its military spending increased to US$ 7.49 billion as of 2022. After the Arab spring events in 2011 and a diplomatic incident with Saudi Arabia and other Gulf countries in 2014, Qatar started expanding its armed forces. The country introduced conscription in 2013,
6000-457: The Tetrabiblos derived from its nature as an exposition of theory, rather than as a manual. A collection of one hundred aphorisms about astrology called the Centiloquium , ascribed to Ptolemy, was widely reproduced and commented on by Arabic, Latin, and Hebrew scholars, and often bound together in medieval manuscripts after the Tetrabiblos as a kind of summation. It is now believed to be
6125-465: The Ubaid period (c. 6500–3800 BC) have been discovered in abandoned coastal settlements. Al Da'asa , a settlement located on the western coast of Qatar, is the most important Ubaid site in the country and is believed to have accommodated a small seasonal encampment. The polity of Dilmun, which is attested to in sources from the 3rd millennium BC onwards, is said to have encompassed Qatar, Bahrain, Kuwait, and
6250-566: The United Arab Emirates . Under an agreement with the United Kingdom, on 3 September 1971, the "special treaty arrangements" that were "inconsistent with full international responsibility as a sovereign and independent state" were terminated. In 1991, Qatar played a significant role in the Gulf War , particularly during the Battle of Khafji in which Qatari tanks rolled through the streets of
6375-539: The United States Central Command headquarters and one of the main launching sites of the invasion of Iraq . In March 2005, a suicide bombing killed a British teacher at the Doha Players Theatre, shocking the country, which had not previously experienced acts of terrorism. The bombing was carried out by Omar Ahmed Abdullah Ali, an Egyptian resident in Qatar who had suspected ties to Al-Qaeda in
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#17330862618086500-461: The equator , as it is today, but Ptolemy preferred to express it as climata , the length of the longest day rather than degrees of arc : The length of the midsummer day increases from 12h to 24h as one goes from the equator to the polar circle . One of the places Ptolemy noted specific coordinates for was the now-lost stone tower which marked the midpoint on the ancient Silk Road , and which scholars have been trying to locate ever since. In
6625-519: The harmonic canon (Greek name) or monochord (Latin name), which is an experimental musical apparatus that he used to measure relative pitches, and used to describe to his readers how to demonstrate the relations discussed in the following chapters for themselves. After the early exposition on to build and use monochord to test proposed tuning systems, Ptolemy proceeds to discuss Pythagorean tuning (and how to demonstrate that their idealized musical scale fails in practice). The Pythagoreans believed that
6750-430: The "criterion" of truth), as well as with the nature and structure of the human psyche or soul, particularly its ruling faculty (i.e., the hegemonikon ). Ptolemy argues that, to arrive at the truth, one should use both reason and sense perception in ways that complement each other. On the Criterion is also noteworthy for being the only one of Ptolemy's works that is devoid of mathematics . Elsewhere, Ptolemy affirms
6875-522: The 9th century suggest that Qatar's inhabitants used greater wealth to construct higher quality homes and public buildings. Over 100 stone-built houses, two mosques, and an Abbasid fort were constructed in Murwab during this period. When the caliphate's prosperity declined in Iraq, so too did it in Qatar. Qatar is mentioned in 13th-century Muslim scholar Yaqut al-Hamawi 's book, Mu'jam Al-Buldan , which alludes to
7000-470: The Arabian Peninsula . The increased influence of Qatar and its role during the Arab Spring , especially during the Bahraini uprising in 2011 , worsened longstanding tensions with Saudi Arabia , the neighboring United Arab Emirates, and Bahrain. In 2010, Qatar won the right to host the 2022 FIFA World Cup , making it the first country in the Middle East to be selected to host the tournament. The awarding increased further investment and developments within
7125-421: The Arabs and Byzantines. His work on epicycles has come to symbolize a very complex theoretical model built in order to explain a false assumption. Ptolemy's date of birth and birthplace are both unknown. The 14th-century astronomer Theodore Meliteniotes wrote that Ptolemy's birthplace was Ptolemais Hermiou , a Greek city in the Thebaid region of Egypt (now El Mansha, Sohag Governorate ). This attestation
7250-436: The French astronomer Delambre in the early 1800s which were repeated by R.R. Newton. Specifically, it proved Hipparchus was not the sole source of Ptolemy's catalog, as they both had claimed, and proved that Ptolemy did not simply copy Hipparchus' measurements and adjust them to account for precession of the equinoxes, as they had claimed. Scientists analyzing the charts concluded: It also confirms that Ptolemy’s Star Catalogue
7375-404: The Great and there were several of this name among Alexander's army, one of whom made himself pharaoh in 323 BC: Ptolemy I Soter , the first pharaoh of the Ptolemaic Kingdom . Almost all subsequent pharaohs of Egypt, with a few exceptions, were named Ptolemy until Egypt became a Roman province in 30 BC, ending the Macedonian family's rule. The name Claudius is a Roman name, belonging to
7500-425: The Greek term Tetrabiblos (lit. "Four Books") or by its Latin equivalent Quadripartitum . Its original title is unknown, but may have been a term found in some Greek manuscripts, Apotelesmatiká ( biblía ), roughly meaning "(books) on the Effects" or "Outcomes", or "Prognostics". As a source of reference, the Tetrabiblos is said to have "enjoyed almost the authority of a Bible among the astrological writers of
7625-402: The Islamic prophet Muhammad sent a Muslim envoy to a ruler in eastern Arabia named Munzir ibn Sawa Al-Tamimi and requested that he and his subjects accept Islam. Munzir obliged his request, and accordingly most of the Arab tribes in the region converted to Islam. In the middle of the century, the Muslim conquest of Persia resulted in the fall of the Sasanian Empire. Qatar was described as
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#17330862618087750-405: The Libyan government and special forces to provide training to Libyan rebels. During the Saudi-led intervention in the Yemeni civil war in September 2015, Qatar sent 1,000 troops, 200 armored vehicles, and 30 Apache helicopters to assist with Saudi military operations. As a result of the diplomatic crisis with Saudi Arabia that began in June 2017, Qatar withdrew its forces from Yemen. Qatar
7875-440: The Middle East . Qatari law does not permit the establishment of political bodies or trade unions. The eighth emir of Qatar is Tamim bin Hamad Al Thani . The emir has the exclusive power to appoint the prime minister and cabinet ministers who, together, constitute the Council of Ministers, which is the supreme executive authority in the country. The Council of Ministers also initiates legislation. The Consultative Assembly
8000-518: The Ottoman rule. Qatari-Ottoman relations stagnated, and in 1882 they suffered further setbacks when the Ottomans refused to aid Al Thani in his expedition of Abu Dhabi-occupied Khor Al Adaid and offered only limited support in the Qatari–Abu Dhabi War , mainly due to fear of British intervention on Abu Dhabi's side. In addition, the Ottomans supported the Ottoman subject Mohammed bin Abdul Wahab who attempted to supplant Al Thani as kaymakam of Qatar in 1888. This eventually led Al Thani to rebel against
8125-422: The Ottomans was met with refusal. In March, Mehmed imprisoned Jassim's brother and 13 prominent Qatari tribal leaders on the Ottoman corvette Merrikh as punishment for his insubordination. After Mehmed declined an offer to release the captives for a fee of 10,000 liras , he ordered a column of approximately 200 troops to advance towards Jassim's Al Wajbah Fort under the command of Yusuf Effendi, thus signalling
8250-564: The Ottomans, whom he believed were seeking to usurp control of the peninsula. He resigned as kaymakam and stopped paying taxes in August 1892. In February 1893, Mehmed Hafiz Pasha arrived in Qatar in the interests of seeking unpaid taxes and accosting Jassim bin Mohammed's opposition to proposed Ottoman administrative reforms. Fearing that he would face death or imprisonment, Jassim retreated to Al Wajbah (16 km or 10 mi west of Doha), accompanied by several tribe members. Mehmed's demand that Jassim disband his troops and pledge his loyalty to
8375-431: The Persian Gulf, separates Qatar from nearby Bahrain . The capital is Doha , home to over 80% of the country's inhabitants. Most of the land area is made up of flat, low-lying desert . Qatar has been ruled as a hereditary monarchy by the House of Thani since Mohammed bin Thani signed "an agreement, not a formal treaty" with Britain in 1868 that recognised its separate status. Following Ottoman rule, Qatar became
8500-403: The Persians. The Al Khalifa imposed their authority over Bahrain and retained their jurisdiction over Zubarah. Following his swearing-in as crown prince of the Wahhabi in 1788, Saud ibn Abd al-Aziz moved to expand Wahhabi territory eastward towards the Persian Gulf and Qatar. After defeating the Bani Khalid in 1795, the Wahhabi were attacked on two fronts. The Ottomans and Egyptians assaulted
8625-501: The Qatari counter-attack, prompted British Political Resident, Colonel Lewis Pelly to impose a settlement in 1868. His mission to Bahrain and Qatar and the resulting peace treaty were milestones because they implicitly recognised the distinctness of Qatar from Bahrain and explicitly acknowledged the position of Mohammed bin Thani. In addition to censuring Bahrain for its breach of agreement, Pelly negotiated with Qatari sheikhs who were represented by Mohammed bin Thani. The negotiations were
8750-405: The Qataris' fine striped woven cloaks and their skills in improvement and finishing of spears. Much of eastern Arabia was controlled by the Usfurids in 1253, but control of the region was seized by the prince of Ormus in 1320. Qatar's pearls provided the kingdom with one of its main sources of income. In 1515, Manuel I of Portugal vassalised the Kingdom of Ormus. Portugal went on to seize
8875-426: The Second World War with the independence of India, the creation of Pakistan in 1947, and the development of oil in Qatar. In 1949, the appointment of the first British political officer in Doha, John Wilton, signified a strengthening of Anglo-Qatari relations. Oil exports began in 1949, and oil revenues became the country's main source of revenue; the pearl trade had gone into decline. These revenues were used to fund
9000-455: The Sun or Moon illusion (the enlarged apparent size on the horizon) based on the difficulty of looking upwards. The work is divided into three major sections. The first section (Book II) deals with direct vision from first principles and ends with a discussion of binocular vision. The second section (Books III-IV) treats reflection in plane, convex, concave, and compound mirrors. The last section (Book V) deals with refraction and includes
9125-496: The US-Iran prisoners swap deal. Iran freed five Americans in exchange for five Iranians held in the US and transfer $ 6 billion in frozen Iranian money from South Korea to Qatar. In October 2023 United States President Joe Biden thanked the Qatar's Sheikh Tamim bin Hamad Al Thani for his help in mediating a landmark prisoner swap deal with Iran. On September 24, 2024, Qatar was designated as
9250-461: The United States, making its air force one of the largest among the Gulf states. The Stockholm International Peace Research Institute (SIPRI) found that in 2010–2014 Qatar was the 46th-largest arms importer in the world. SIPRI writes that Qatar's plans to transform and significantly enlarge its armed forces have accelerated. In 2015, Qatar was the 16th largest arms importer in the world, and in 2016, it
9375-422: The ability to make any predictions. The earliest person who attempted to merge these two approaches was Hipparchus , who produced geometric models that not only reflected the arrangement of the planets and stars but could be used to calculate celestial motions. Ptolemy, following Hipparchus, derived each of his geometrical models for the Sun, Moon, and the planets from selected astronomical observations done in
9500-520: The appearances and disappearances of stars over the course of the solar year. The Planisphaerium ( Greek : Ἅπλωσις ἐπιφανείας σφαίρας , lit. ' Flattening of the sphere ' ) contains 16 propositions dealing with the projection of the celestial circles onto a plane. The text is lost in Greek (except for a fragment) and survives in Arabic and Latin only. Ptolemy also erected an inscription in
9625-500: The country from his father Khalifa bin Hamad Al Thani , with the support of the armed forces and cabinet, as well as neighbouring states and France. Under Emir Hamad, Qatar experienced a moderate degree of liberalisation, including the launch of the Al Jazeera television station (1996), the endorsement of women's suffrage or right to vote in municipal elections (1999), drafting its first written constitution (2005) and inauguration of
9750-506: The data needed to compute the positions of the Sun, Moon and planets, the rising and setting of the stars, and eclipses of the Sun and Moon, making it a useful tool for astronomers and astrologers. The tables themselves are known through Theon of Alexandria 's version. Although Ptolemy's Handy Tables do not survive as such in Arabic or in Latin, they represent the prototype of most Arabic and Latin astronomical tables or zījes . Additionally,
9875-402: The earliest surviving table of refraction from air to water, for which the values (with the exception of the 60° angle of incidence) show signs of being obtained from an arithmetic progression. However, according to Mark Smith, Ptolemy's table was based in part on real experiments. Ptolemy's theory of vision consisted of rays (or flux) coming from the eye forming a cone, the vertex being within
10000-591: The eastern portion of Saudi Arabia. Some historians have theorized that the Sumerians may have originated from this region. Kassite Babylonian material dating back to the second millennium BC found in Al Khor Islands attests to trade relations between the inhabitants of Qatar and the Kassites in modern-day Bahrain. Among the findings were crushed snail shells and Kassite potsherds. It has been suggested that Qatar
10125-506: The eastward dispersal of the religion by Mesopotamian Christians. Monasteries were constructed and further settlements were founded during this era. During the latter part of the Christian era, Qatar comprised a region known as 'Beth Qatraye' ( Syriac for "house of the Qataris"). The region was not limited to Qatar; it also included Bahrain , Tarout Island , Al-Khatt, and Al-Hasa . In 628,
10250-469: The elevation of the north celestial pole for a few cities. Although maps based on scientific principles had been made since the time of Eratosthenes ( c. 276 – c. 195 BC ), Ptolemy improved on map projections . The first part of the Geography is a discussion of the data and of the methods he used. Ptolemy notes the supremacy of astronomical data over land measurements or travelers' reports, though he possessed these data for only
10375-425: The empirical musical relations he identified by testing pitches against each other: He was able to accurately measure relative pitches based on the ratios of vibrating lengths two separate sides of the same single string , hence which were assured to be under equal tension, eliminating one source of error. He analyzed the empirically determined ratios of "pleasant" pairs of pitches, and then synthesised all of them into
10500-484: The expansion and modernisation of Qatar's infrastructure. When Britain officially announced in 1968 that it would withdraw from the Persian Gulf in three years' time, Qatar joined talks with Bahrain and seven other Trucial States to create a federation. Regional disputes, however, persuaded Qatar and Bahrain to withdraw from the talks and become independent states separate from the Trucial States, which went on to become
10625-419: The eye, and the base defining the visual field. The rays were sensitive, and conveyed information back to the observer's intellect about the distance and orientation of surfaces. Size and shape were determined by the visual angle subtended at the eye combined with perceived distance and orientation. This was one of the early statements of size-distance invariance as a cause of perceptual size and shape constancy,
10750-498: The first Arab and Muslim-majority country to do so, and the third Asian country to host it following the 2002 FIFA World Cup in Japan and South Korea. Qatar is officially a semi-constitutional monarchy , but the wide powers retained by the monarchy have it bordering an absolute monarchy ruled by the Al Thani family . The Al Thani dynasty has been ruling Qatar since the family house
10875-471: The first Gulf country to join the U.S. Visa Waiver Program (VWP), allowing its citizens to travel to the United States for up to 90 days for business or tourism without a visa. The inclusion strengthens security cooperation between the two nations and eases travel for Qatari citizens. U.S. citizens are now permitted to stay in Qatar for up to 90 days without a visa, an increase from the previous 30-day limit. The Qatar Armed Forces consist of 12,000 personnel in
11000-595: The first Gulf state to do so in recent years. It is mandatory for Qatari male citizens to serve for up to 4 months, though not all of them are called up. The national service term was extended to one year in 2018. About 2,000 conscripts pass through the Qatar Armed Forces annually. Military service has become more popular in Qatar due to the recent tensions with Saudi Arabia and the UAE. Since 2017, Qatar has also purchased large quantities of equipment from European countries and
11125-516: The first stage in the development of Qatar as a sheikhdom. Under military and political pressure from the governor of the Ottoman Vilayet of Baghdad , Midhat Pasha , the ruling Al Thani tribe submitted to Ottoman rule in 1871. The Ottoman government imposed reformist ( Tanzimat ) measures concerning taxation and land registration to fully integrate these areas into the empire. Despite the disapproval of local tribes, Al Thani continued supporting
11250-625: The fort in Zubarah. The Al Khalifa was effectively returned to power thereafter. As punishment for piracy, an East India Company vessel bombarded Doha in 1821, destroying the town and forcing hundreds of residents to flee. In 1825, the House of Thani was established with Sheikh Mohammed bin Thani as the first leader. Although Qatar was considered a dependency of Bahrain, the Al Khalifa faced opposition from
11375-553: The history of science". One striking error noted by Newton was an autumn equinox said to have been observed by Ptolemy and "measured with the greatest care" at 2pm on 25 September 132, when the equinox should have been observed around 9:55am the day prior. In attempting to disprove Newton, Herbert Lewis also found himself agreeing that "Ptolemy was an outrageous fraud," and that "all those result capable of statistical analysis point beyond question towards fraud and against accidental error". The charges laid by Newton and others have been
11500-476: The idea of peace talks." It played a major role in establishing the first ceasefire in the 2023 Israel-Hamas war and the concurrent initial hostage exchange. These high-risk diplomatic middle man endeavors (and its own rigorous defense stance) have thus earned it a reputation as "a prickly Switzerland ". In June 2017, Saudi Arabia, the UAE, Bahrain, Egypt and Yemen broke diplomatic ties with Qatar, accusing Qatar of supporting terrorism . The crisis escalated
11625-599: The introduction to the Handy Tables survived separately from the tables themselves (apparently part of a gathering of some of Ptolemy's shorter writings) under the title Arrangement and Calculation of the Handy Tables . The Planetary Hypotheses ( Greek : Ὑποθέσεις τῶν πλανωμένων , lit. ' Hypotheses of the Planets ' ) is a cosmological work, probably one of the last written by Ptolemy, in two books dealing with
11750-646: The latter guaranteed the protection of Qatar from aggression by sea and provide its 'good offices' in the event of an attack by land. This latter undertaking was left deliberately vague. On 5 May 1935, while agreeing an oil concession with the Anglo-Persian Oil Company , Abdullah signed another treaty with the British government which granted Qatar protection against internal and external threats. Oil reserves were first discovered in 1939. Exploitation and development were, however, delayed by World War II . The focus of British interests in Qatar changed after
11875-547: The local tribes. In 1867, the Al Khalifa, along with the ruler of Abu Dhabi , sent a massive naval force to Al Wakrah in an effort to crush the Qatari rebels. This resulted in the maritime Qatari–Bahraini War of 1867–68, in which Bahraini and Abu Dhabi forces sacked and looted Doha and Al Wakrah. The Bahraini hostilities were in violation of the Perpetual Truce of Peace and Friendship of 1861. The joint incursion, in addition to
12000-500: The mathematics of music should be based on only the one specific ratio of 3:2, the perfect fifth , and believed that tunings mathematically exact to their system would prove to be melodious, if only the extremely large numbers involved could be calculated (by hand). To the contrary, Ptolemy believed that musical scales and tunings should in general involve multiple different ratios arranged to fit together evenly into smaller tetrachords (combinations of four pitch ratios which together make
12125-555: The modern title is thought to be an Arabic corruption of the Greek name Hē Megistē Syntaxis (lit. "The greatest treatise"), as the work was presumably known in Late Antiquity . Because of its reputation, it was widely sought and translated twice into Latin in the 12th century , once in Sicily and again in Spain. Ptolemy's planetary models, like those of the majority of his predecessors, were geocentric and almost universally accepted until
12250-477: The motions of the Sun, Moon, planets, and stars. In 2023, archaeologists were able to read a manuscript which gives instructions for the construction of an astronomical tool called a meteoroscope ( μετεωροσκόπιον or μετεωροσκοπεῖον ). The text, which comes from an eighth-century manuscript which also contains Ptolemy's Analemma , was identified on the basis of both its content and linguistic analysis as being by Ptolemy. Ptolemy's second most well-known work
12375-538: The name is pronounced [ˈqɑtˤɑr] , while in the local dialect it is [ˈɡɪtˤɑr] . English speakers use different approximate pronunciations of the name as the Arabic pronunciations use sounds not often used in English. Human habitation in Qatar dates back to 50,000 years ago. Settlements and tools dating back to the Stone Age have been unearthed in the peninsula. Mesopotamian artifacts originating from
12500-463: The nation during the 2010s. In June 2013, Sheikh Tamim bin Hamad Al Thani became the emir of Qatar after his father handed over power. Sheikh Tamim has prioritised improving the domestic welfare of citizens, which includes establishing advanced healthcare and education systems, and expanding the country's infrastructure in preparation for the hosting of the 2022 World Cup. Qatar hosted the 2022 FIFA World Cup from 21 November to 18 December, becoming
12625-461: The observations were taken at 12:30pm. The overall quality of Ptolemy's observations has been challenged by several modern scientists, but prominently by Robert R. Newton in his 1977 book The Crime of Claudius Ptolemy , which asserted that Ptolemy fabricated many of his observations to fit his theories. Newton accused Ptolemy of systematically inventing data or doctoring the data of earlier astronomers, and labelled him "the most successful fraud in
12750-591: The only mathematically sound geocentric model of the Solar System , and unlike most Greek mathematicians , Ptolemy's writings (foremost the Almagest ) never ceased to be copied or commented upon, both in late antiquity and in the Middle Ages . However, it is likely that only a few truly mastered the mathematics necessary to understand his works, as evidenced particularly by the many abridged and watered-down introductions to Ptolemy's astronomy that were popular among
12875-417: The outbreak of World War I , nothing was done to carry this out, and the garrison remained in the fort at Doha, although its numbers dwindled as men deserted. In 1915, with the presence of British gunboats in the harbour, Abdullah bin Jassim Al Thani (who was pro-British) persuaded the remainder to abandon the fort, and when British troops approached the following morning they found it deserted. Qatar became
13000-439: The peninsula, referring to it as Catara . The map also referenced a town named "Cadara" to the east of the peninsula. The term "Catara" (inhabitants, Cataraei ) was exclusively used until the 18th century, after which "Katara" emerged as the most commonly recognised spelling. Eventually, after several variations—"Katr", "Kattar" and "Guttur"—the modern derivative Qatar was adopted as the country's name. In Standard Arabic ,
13125-474: The population of Qatar 2.6 million, although only 313,000 of them are Qatari citizens and 2.3 million being expatriates and migrant workers . Its official religion is Islam . The country has the fourth-highest GDP (PPP) per capita in the world and the eleventh-highest GNI per capita (Atlas method) . It ranks 42nd in the Human Development Index , the third-highest HDI in the Arab world . It
13250-401: The radius of the sphere of the fixed stars was 20 000 times the radius of the Earth. The work is also notable for having descriptions on how to build instruments to depict the planets and their movements from a geocentric perspective, much as an orrery would have done for a heliocentric one, presumably for didactic purposes. The Analemma is a short treatise where Ptolemy provides
13375-486: The reappearance of heliocentric models during the scientific revolution . Under the scrutiny of modern scholarship, and the cross-checking of observations contained in the Almagest against figures produced through backwards extrapolation, various patterns of errors have emerged within the work. A prominent miscalculation is Ptolemy's use of measurements that he claimed were taken at noon, but which systematically produce readings now shown to be off by half an hour, as if
13500-402: The reconquest of the castle of Tarout or Al Qatif in 1551. Archaeological finds are still being excavated from one of the Portuguese fortresses that served as a base to dominate the region as Ruwayda . The first representation of Qatar appears on the Portuguese map by Luis Lázaro in 1563, showing the "city of Qatar" as a fortress, possibly referring to the fort of Ruwayda. Having retained
13625-689: The region. In 2011, Qatar joined NATO operations in Libya and reportedly armed Libyan opposition groups. It was also a major funder of weapons for rebel groups in the Syrian civil war . Qatar participated in the Saudi Arabian-led intervention in Yemen against the Houthis and forces loyal to former President Ali Abdullah Saleh . Since the 2000s, Qatar increasingly emerged on a wider foreign policy stage especially as
13750-546: The safe passage of Mehmed Pasha's cavalry to Hofuf by land. Although Qatar did not gain full independence from the Ottoman Empire, the result of the battle forced a treaty that would later form the basis of Qatar's emerging as an autonomous country within the empire. By the Anglo-Ottoman Convention of 1913 , the Ottomans agreed to renounce their claim to Qatar and withdraw their garrison from Doha. However, with
13875-405: The secondary literature, while noting that issues with the accuracy of Ptolemy's observations had long been known. Other authors have pointed out that instrument warping or atmospheric refraction may also explain some of Ptolemy's observations at a wrong time. In 2022 the first Greek fragments of Hipparchus' lost star catalog were discovered in a palimpsest and they debunked accusations made by
14000-474: The spanning of more than 800 years; however, many astronomers have for centuries suspected that some of his models' parameters were adopted independently of observations. Ptolemy presented his astronomical models alongside convenient tables, which could be used to compute the future or past position of the planets. The Almagest also contains a star catalogue , which is a version of a catalogue created by Hipparchus . Its list of forty-eight constellations
14125-451: The spheres ). Although Ptolemy's Harmonics never had the influence of his Almagest or Geography , it is nonetheless a well-structured treatise and contains more methodological reflections than any other of his writings. In particular, it is a nascent form of what in the following millennium developed into the scientific method, with specific descriptions of the experimental apparatus that he built and used to test musical conjectures, and
14250-469: The start of the Battle of Al Wajbah . Effendi's troops came under heavy gunfire by a sizable troop of Qatari infantry and cavalry shortly after arriving at Al Wajbah. They retreated to Shebaka fortress where they were again forced to draw back from a Qatari incursion. After they withdrew to Al Bidda fortress, Jassim's advancing column besieged the fortress, resulting in the Ottomans' concession of defeat and agreement to relinquish their captives in return for
14375-415: The strategy of balancing and alliance building among regional and great powers. It maintains independent foreign policy and engages in regional balancing to secure its strategic priorities and to have recognition on the regional and international level. As a comparatively small state in the gulf, Qatar established an "open-door" foreign policy where Qatar maintains ties to all parties and regional players in
14500-440: The structure of the universe and the laws that govern celestial motion . Ptolemy goes beyond the mathematical models of the Almagest to present a physical realization of the universe as a set of nested spheres, in which he used the epicycles of his planetary model to compute the dimensions of the universe. He estimated the Sun was at an average distance of 1 210 Earth radii (now known to actually be ~23 450 radii), while
14625-517: The subject of wide discussions and received significant push back from other scholars against the findings. Owen Gingerich , while agreeing that the Almagest contains "some remarkably fishy numbers", including in the matter of the 30-hour displaced equinox, which he noted aligned perfectly with predictions made by Hipparchus 278 years earlier, rejected the qualification of fraud. Objections were also raised by Bernard Goldstein , who questioned Newton's findings and suggested that he had misunderstood
14750-496: The supremacy of mathematical knowledge over other forms of knowledge. Like Aristotle before him, Ptolemy classifies mathematics as a type of theoretical philosophy; however, Ptolemy believes mathematics to be superior to theology or metaphysics because the latter are conjectural while only the former can secure certain knowledge. This view is contrary to the Platonic and Aristotelian traditions, where theology or metaphysics occupied
14875-573: The third part of the Geography , Ptolemy gives instructions on how to create maps both of the whole inhabited world ( oikoumenē ) and of the Roman provinces, including the necessary topographic lists, and captions for the maps. His oikoumenē spanned 180 degrees of longitude from the Blessed Islands in the Atlantic Ocean to the middle of China , and about 80 degrees of latitude from Shetland to anti-Meroe (east coast of Africa ); Ptolemy
15000-460: The town and provided fire support for Saudi Arabian National Guard units that were engaging Iraqi Army troops. Qatar allowed coalition troops from Canada to use the country as an airbase to launch aircraft on combat air patrol duty and also permitted air forces from the United States and France to operate in its territories. In 1995, Emir Hamad bin Khalifa Al Thani seized control of
15125-678: The western front, while the Al Khalifa in Bahrain and the Omanis launched an attack against the eastern front. Upon being made aware of the Egyptian advance on the western frontier in 1811, the Wahhabi amir reduced his garrisons in Bahrain and Zubarah in order to redeploy his troops. Said bin Sultan , ruler of Muscat , capitalised on this opportunity and raided the Wahhabi garrisons on the eastern coast, setting fire to
15250-459: Was established in 1825. In 2003, Qatar adopted a constitution that provided for the direct election of 30 of the 45 members of a legislature. The constitution was overwhelmingly approved in a referendum, with almost 98% in favour. Despite this, the government remains authoritarian . According to the V-Dem Democracy indices Qatar is 2023 the second least electoral democratic country in
15375-464: Was not based solely on data from Hipparchus’ Catalogue. ... These observations are consistent with the view that Ptolemy composed his star catalogue by combining various sources, including Hipparchus’ catalogue, his own observations and, possibly, those of other authors. The Handy Tables ( Greek : Πρόχειροι κανόνες ) are a set of astronomical tables, together with canons for their use. To facilitate astronomical calculations, Ptolemy tabulated all
15500-471: Was the 11th largest, according to SIPRI. Qatar has signed defense pacts with the United States, the United Kingdom, and France. The forward headquarters of United States Central Command , Al Udeid Air Base , is located in Qatar and houses about 10,000 American military personnel. During the 2011 military intervention in Libya , Qatar deployed six Mirage 2000 fighter jets to assist the NATO air campaign against
15625-499: Was well aware that he knew about only a quarter of the globe, and an erroneous extension of China southward suggests his sources did not reach all the way to the Pacific Ocean. It seems likely that the topographical tables in the second part of the work (Books 2–7) are cumulative texts, which were altered as new knowledge became available in the centuries after Ptolemy. This means that information contained in different parts of
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