114-502: Alexandria is a city in Egypt. Alexandria may also refer to: These are places named for, and sometimes founded by, Alexander the Great, arranged roughly west to east: Alexandria Alexandria ( / ˌ æ l ɪ ɡ ˈ z æ n d r i ə , - ˈ z ɑː n -/ AL -ig- ZA(H)N -dree-ə ; Arabic : الإسكندرية ; Ancient Greek : Ἀλεξάνδρεια , Coptic : Ⲣⲁⲕⲟϯ - Rakoti or ⲁⲗⲉⲝⲁⲛⲇⲣⲓⲁ)
228-581: A Greek periplus written by an unknown author around the 1st century, contains a detailed description of the Red Sea's ports and sea routes. The Periplus also describes how Hippalus first discovered the direct route from the Red Sea to India . The Red Sea was favored for Roman trade with India starting with the reign of Augustus , when the Roman Empire gained control over the Mediterranean, Egypt , and
342-422: A Hippodamian grid plan . Following Alexander's death in 323 BC, his general Ptolemy Lagides took possession of Egypt and brought Alexander's body to Egypt with him. Ptolemy at first ruled from the old Egyptian capital of Memphis . In 322/321 BC he had Cleomenes executed. Finally, in 305 BC, Ptolemy declared himself Pharaoh as Ptolemy I Soter ("Savior") and moved his capital to Alexandria. Although Cleomenes
456-458: A Roman triumphal column , is one of the best-known ancient monuments still standing in Alexandria today. It is located on Alexandria's ancient acropolis —a modest hill located adjacent to the city's Arab cemetery —and was originally part of a temple colonnade. Including its pedestal , it is 30 m (99 ft) high; the shaft is of polished red granite, 2.7 m (8.9 ft) in diameter at
570-471: A hot steppe climate (Köppen climate classification: BSh ), virtually hot desert climate ( Köppen climate classification : BWh ). Like the rest of Egypt's northern coast , the prevailing north wind, blowing across the Mediterranean, gives the city a less severe climate than the desert hinterland. Rafah and Alexandria are the wettest places in Egypt; the other wettest places are Rosetta , Baltim , Kafr el-Dawwar , and Mersa Matruh . The city's climate
684-402: A Greek unit of length measuring approximately 180 m or 590 ft). The end of this abutted on the land at the head of the present Grand Square, where the "Moon Gate" rose. All that now lies between that point and the modern "Ras al-Tin" quarter is built on the silt which gradually widened and obliterated this mole. The Ras al-Tin quarter represents all that is left of the island of Pharos,
798-541: A Nile river delta, Alexandria is one of the most vulnerable cities to sea level rise in the entire world. According to some estimates, hundreds of thousands of people in its low-lying areas may already have to be relocated before 2030. The 2022 IPCC Sixth Assessment Report estimates that by 2050, Alexandria and 11 other major African cities ( Abidjan , Algiers , Cape Town , Casablanca , Dakar , Dar es Salaam , Durban , Lagos , Lomé , Luanda and Maputo ) would collectively sustain cumulative damages of US$ 65 billion for
912-645: A Ptolemaic colonnade and streets in the north-east of the city, but little else. Hogarth explored part of an immense brick structure under the mound of Kom El Deka , which may have been part of the Paneum, the Mausolea, or a Roman fortress. The making of the new foreshore led to the dredging up of remains of the Patriarchal Church; and the foundations of modern buildings are seldom laid without some objects of antiquity being discovered. The most famous mosque in Alexandria
1026-522: A bishop decreed that Paganism must be eradicated. Beneath the acropolis itself are the subterranean remains of the Serapeum, where the mysteries of the god Serapis were enacted and whose carved wall niches are believed to have provided overflow storage space for the ancient Library. In more recent years, many ancient artifacts have been discovered from the surrounding sea, mostly pieces of old pottery. Alexandria's catacombs , known as Kom El Shoqafa , are
1140-662: A popular destination for diving after the expeditions of Hans Hass in the 1950s, and later by Jacques-Yves Cousteau . Popular tourist resorts include El Gouna , Hurghada , Safaga , Marsa Alam , on the west shore of the Red Sea, and Sharm-el-Sheikh , Dahab , and Taba on the Egyptian side of Sinaï , as well as Aqaba in Jordan and Eilat in Israel in an area known as the Red Sea Riviera . The popular tourist beach of Sharm el-Sheikh
1254-461: A seawall, quays and a bridge. Near the beach side of the area, there are the remains of a tower built by Ptolemy II Philadelphus. The tower was an exact scale replica of the destroyed Alexandrine Pharos Lighthouse . Citadel of Qaitbay is a defensive fortress located on the Mediterranean sea coast. It was established in 1477 AD (882 AH ) by the mamluk Sultan Al-Ashraf Sayf al-Din Qa'it Bay . The Citadel
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#17328835568261368-429: A short distance southwest of the pillar, consist of a multi-level labyrinth, reached via a large spiral staircase and featuring dozens of chambers adorned with sculpted pillars, statues, and other syncretic Romano-Egyptian religious symbols , burial niches, and sarcophagi , as well as a large Roman-style banquet room, where memorial meals were conducted by relatives of the deceased. The catacombs were long forgotten by
1482-415: A successful attempt to erect a 25-ton obelisk in 1999. This followed two experiments to erect smaller obelisks and two failed attempts to erect a 25-ton obelisk. "Pompey's Pillar" is a misnomer , as it has nothing to do with Pompey , having been erected in 293 for Diocletian , possibly in memory of the rebellion of Domitius Domitianus . The structure was plundered and demolished in the 4th century when
1596-1145: Is Abu al-Abbas al-Mursi Mosque in Bahary . Other notable mosques in the city include Ali ibn Abi Talib mosque in Somouha, Bilal mosque, al-Gamaa al-Bahari in Mandara, Hatem mosque in Somouha, Hoda el-Islam mosque in Sidi Bishr, al-Mowasah mosque in Hadara, Sharq al-Madina mosque in Miami, al-Shohadaa mosque in Mostafa Kamel, Al Qa'ed Ibrahim Mosque, Yehia mosque in Zizinia, Sidi Gaber mosque in Sidi Gaber, Sidi B esher mosque, Rokay el-Islam mosque in Elessway, Elsadaka Mosque in Sidibesher Qebly, Elshatbi mosque and Sultan mosque. Red Sea The Red Sea
1710-815: Is a direct translation of the Ancient Greek Erythra Thalassa ( Ἐρυθρὰ Θάλασσα ). The sea itself was once referred to as the Erythraean Sea by Europeans. As well as Mare Rubrum in Latin (alternatively Sinus Arabicus , literally "Arabian Gulf"), the Romans called it Pontus Herculis (Sea of Hercules). Other designations include the Arabic : البحر الأحمر , romanized : Al-Baḥr Al-Aḥmar (alternatively بحر القلزم Baḥr Al-Qulzum , literally "the Sea of Clysma "),
1824-542: Is a popular tourist destination and an important industrial centre due to its natural gas and oil pipelines from Suez . The city extends about 40 km (25 mi) along the northern coast of Egypt and is the largest city on the Mediterranean, the second-largest in Egypt (after Cairo ), the fourth-largest city in the Arab world , the ninth-largest city in Africa , and the ninth-largest urban area in Africa . The city
1938-833: Is a sea inlet of the Indian Ocean , lying between Africa and Asia. Its connection to the ocean is in the south, through the Bab-el-Mandeb strait and the Gulf of Aden . To its north lie the Sinai Peninsula , the Gulf of Aqaba , and the Gulf of Suez —leading to the Suez Canal . It is underlain by the Red Sea Rift , which is part of the Great Rift Valley . The Red Sea has a surface area of roughly 438,000 km (169,000 sq mi),
2052-613: Is about 2,250 km (1,400 mi) long, and 355 km (221 mi) wide at its widest point. It has an average depth of 490 m (1,610 ft), and in the central Suakin Trough it reaches its maximum depth of 3,040 m (9,970 ft). Approximately 40% of the Red Sea is quite shallow at less than 100 m (330 ft) deep, and about 25% is less than 50 m (160 ft) deep. The extensive shallow shelves are noted for their marine life and corals . More than 1,000 invertebrate species and 200 types of soft and hard coral live in
2166-475: Is built up') existed since the 13th century BC in the vicinity and eventually grew into the Egyptian quarter of the city. Just east of Alexandria (where Abu Qir Bay is now), there were in ancient times marshland and several islands. As early as the 7th century BC, there existed important port cities of Canopus and Heracleion . The latter was recently rediscovered underwater. Alexandria was founded by Alexander
2280-475: Is considered that it will become an ocean in time (as proposed in the model of John Tuzo Wilson ). In 1949, a deep water survey reported anomalously hot brines in the central portion of the Red Sea. Later work in the 1960s confirmed the presence of hot, 60 °C (140 °F), saline brines and associated metalliferous muds. The hot solutions were emanating from an active subseafloor rift . Lake Asal in Djibouti
2394-447: Is eligible as an experimental site to study the evolution of the deep hot brines of the Red Sea. By observing the strontium isotope composition of the Red Sea brines, it is possible to deduce how these salt waters found at the bottom of the Red Sea could have evolved in a similar way to Lake Asal, which ideally represents their compositional extreme. The high salinity of the waters was not hospitable to living organisms. Sometime during
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#17328835568262508-589: Is in the Far West Nile delta area. It is a densely populated city; its core areas belie its large administrative area. Notes: 2020 CAPMAS projection based on 2017 revised census figures, may differ significantly from 2017 census preliminary tabulations. The 14 kisms were reported simply as Alexandria city by CAPMAS in 2006 but given explosive growth definitions, likely informal, may have changed or may be set to change. Same area with 12 kisms existed in 1996. Kisms are considered 'fully urbanised' Alexandria has
2622-537: Is influenced by the Mediterranean Sea , moderating its temperatures, causing variable rainy winters and moderately hot and slightly prolonged summers that, at times, can be very humid; January and February are the coolest months, with daily maximum temperatures typically ranging from 12 to 18 °C (54 to 64 °F) and minimum temperatures that could reach 5 °C (41 °F ). Alexandria experiences violent storms , rain and sometimes sleet and hail during
2736-579: Is located on the eastern side of the northern tip of Pharos Island at the mouth of the Eastern Harbour . It was erected on the exact site of the famous Lighthouse of Alexandria , which was one of the Seven Wonders of the Ancient World . It was built on an area of 17,550 square metres . Persistent efforts have been made to explore the antiquities of Alexandria. Encouragement and help have been given by
2850-543: Is that some Asiatic languages used color words to refer to the cardinal directions . Herodotus on one occasion uses Red Sea and Southern Sea interchangeably. The name in Hebrew Yam Suph ( Hebrew : ים סוף , lit. 'Sea of Reeds') is of biblical origin. The name in Coptic : ⲫⲓⲟⲙ `ⲛϩⲁϩ Phiom Enhah ("Sea of Hah") is connected to Ancient Egyptian root ḥ-ḥ which refers to water and sea (for example
2964-536: Is the second largest city in Egypt and the largest city on the Mediterranean coast . It lies at the western edge of the Nile River delta . Founded in c. 331 BC by Alexander the Great , Alexandria grew rapidly and became a major centre of Hellenic civilisation , eventually replacing Memphis , in present-day Greater Cairo , as Egypt's capital. Called the "Bride of the Mediterranean" internationally, Alexandria
3078-416: Is the driving force in the Red Sea to transport material as suspension or as bedload. Wind-induced currents play an important role in the Red Sea in resuspending bottom sediments and transferring materials from sites of dumping to sites of burial in quiescent environment of deposition. Wind-generated current measurement is therefore important in order to determine the sediment dispersal pattern and its role in
3192-467: The 2023-2024 Israel-Hamas war . One ship was hijacked and taken back to Yemen. The Red Sea is between arid land, desert and semi-desert . Reef systems are better developed along the Red Sea mainly because of its greater depths and an efficient water circulation pattern. The Red Sea water mass-exchanges its water with the Arabian Sea , Indian Ocean via the Gulf of Aden . These physical factors reduce
3306-637: The Battle of Ridaniya in 1517, the city was conquered by the Ottoman Turks and remained under Ottoman rule until 1798. Alexandria lost much of its former importance to the Egyptian port city of Rosetta during the 9th to 18th centuries, and it only regained its former prominence with the construction of the Mahmoudiyah Canal in 1820. Alexandria figured prominently in the military operations of Napoleon 's expedition to Egypt in 1798. French troops stormed
3420-494: The Coptic ⲫⲓⲟⲙ ̀ⲛϣⲁⲣⲓ Phiom ̀nšari , Syriac ܝܡܐ ܣܘܡܩܐ Yammāʾ summāqā, Somali Badda cas and Tigrinya Qeyyiḥ bāḥrī (ቀይሕ ባሕሪ). The name of the sea may signify the seasonal blooms of the red-coloured Trichodesmium erythraeum near the water's surface. A theory favored by some modern scholars is that the name red is referring to the direction south, just as the Black Sea 's name may refer to north. The basis of this theory
3534-553: The Coptic Orthodox Church and the Greek Orthodox Church of Alexandria both lay claim to this ancient heritage. By 641, the city had already been largely plundered and lost its significance before re-emerging in the modern era. From the late 18th century, Alexandria became a major centre of the international shipping industry and one of the most important trading centres in the world, both because it profited from
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3648-694: The Mediterranean Sea . To the point that a number of them now form a significant component of the Mediterranean ecosystem. The resulting change in biodiversity, without precedent in human memory, is currently accelerating, in particular for fishes according to surveys engaged by the Mediterranean Science Commission . The rich diversity of the Red Sea is in part due to the 2,000 km (1,240 mi) of coral reef extending along its coastline; these fringing reefs are 5000–7000 years old and are largely formed of stony acropora and porites corals. The reefs form platforms and sometimes lagoons along
3762-640: The Muslim conquest of Egypt in 641 AD, when a new capital was founded at Fustat (later absorbed into Cairo ). Alexandria was best known for the Lighthouse of Alexandria ( Pharos ), one of the Seven Wonders of the Ancient World ; its Great Library , the largest in the ancient world; and the Catacombs of Kom El Shoqafa , one of the Seven Wonders of the Middle Ages . Alexandria was the intellectual and cultural centre of
3876-634: The Red Sea slave trade from Africa to the Middle East. During the Middle Ages , the Red Sea was an important part of the spice trade route. In 1183, Raynald of Châtillon launched a raid down the Red Sea to attack the Muslim pilgrim convoys to Mecca. The possibility that Raynald's fleet might sack the holy cities of Mecca and Medina caused fury throughout the Muslim world. However, it appears that Reynald's target
3990-781: The Second World War , the Americans and Soviets exerted their influence whilst the volume of oil tanker traffic intensified. However, the Six-Day War culminated in the closure of the Suez Canal from 1967 to 1975. Today, in spite of patrols by the major maritime fleets in the waters of the Red Sea, the Suez Canal has never recovered its supremacy over the Cape route, which is believed to be less vulnerable to piracy. Iranian -backed Yemini Houthis have attacked Western ships, including warships , during
4104-647: The Septuagint translation of the Book of Exodus from Hebrew to Koine Greek in approximately the third century BC. In that version, the Yam Suph ( Hebrew : ים סוף , lit. 'Sea of Reeds') is translated as Erythra Thalassa (Red Sea). The Red Sea is one of four seas named in English after common color terms – the others being the Black Sea , the White Sea and
4218-764: The Tertiary period, the Bab el Mandeb closed and the Red Sea evaporated to an empty hot dry salt-floored sink. Effects causing this would have been: A number of volcanic islands rise from the center of the sea. Most are dormant. However, in 2007, Jabal al-Tair island in the Bab el Mandeb strait erupted violently. Two new islands were formed in 2011 and 2013 in the Zubair Archipelago , a small chain of islands owned by Yemen. The first island, Sholan Island, emerged in an eruption in December 2011,
4332-615: The Yellow Sea . The direct rendition of the Greek Erythra thalassa in Latin as Mare Erythraeum refers to the north-western part of the Indian Ocean , and also to a region on Mars . The earliest known exploration of the Red Sea was conducted by ancient Egyptians , as they attempted to establish commercial routes to Punt . One such expedition took place around 2500 BC, and another around 1500 BC (by Hatshepsut ). Both involved long voyages down
4446-892: The global economy , with cargo vessels traveling between the Indian Ocean and the Mediterranean Sea every year, thus shortening the path between Asia and Europe almost by half (as compared to traveling around Africa via the Atlantic Ocean). 12% of global trade passes through the Red Sea. This includes 30% of global container traffic. The sea is known for its recreational diving sites, such as Ras Mohammed , SS Thistlegorm (shipwreck), Elphinstone Reef , The Brothers , Daedalus Reef , St. John's Reef , Rocky Island in Egypt and less known sites in Sudan such as Sanganeb , Abington , Angarosh and Shaab Rumi . The Red Sea became
4560-517: The sabkhas through a network of channels. However, south of Jeddah in the Shoiaba area, the water from the lagoon may cover the adjoining sabkhas as far as 3 km (2 mi), whereas north of Jeddah in the Al-Kharrar area the sabkhas are covered by a thin sheet of water as far as 2 km (1.2 mi). The prevailing north and northeast winds influence the movement of water in the coastal inlets to
4674-464: The "moderate" climate change scenario RCP 4.5 and US$ 86.5 billion for the high-emission scenario RCP 8.5, while RCP 8.5 combined with the hypothetical impact from marine ice sheet instability at high levels of warming would involve up to US$ 137.5 billion in damages. Additional accounting for the "low-probability, high-damage events" may increase aggregate risks to US$ 187 billion for the "moderate" RCP4.5, US$ 206 billion for RCP8.5 and US$ 397 billion under
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4788-438: The 44 recorded species of shark, and by many species (over 175) of nudibranch , many of which are endemic to the Red Sea. Other coastal Red Sea habitats include sea grass beds, salt pans , mangrove and salt marsh . Furthermore the deep Red Sea brine pools have been extensively studied with regard to their microbial life, characterized by its diversity and adaptation to extreme environments. The high marine biodiversity of
4902-524: The 4th century AD. This underwater section, containing many of the most interesting sections of the Hellenistic city, including the palace quarter, was explored in 1992 and is still being extensively investigated by the French underwater archaeologist Franck Goddio and his team . It raised a noted head of Caesarion . These are being opened up to tourists, to some controversy. The spaces that are most open are
5016-540: The 6th century BC, Darius the Great , who was a prominent ruler of the Achaemenid Empire in Persia, undertook significant efforts to improve and extend navigation in the Red Sea. He sent reconnaissance missions to explore the Red Sea area and to identify its various navigational hazards, such as rocks and currents. This effort was significant, as it contributed to safer and more efficient navigation routes. In addition to
5130-521: The Achaemenid Empire's economic and political power in the region. In the late 4th century BC, Alexander the Great sent Greek naval expeditions down the Red Sea to the Indian Ocean . Greek navigators continued to explore and compile data on the Red Sea. Agatharchides collected information about the sea in the 2nd century BC. The Periplus of the Erythraean Sea (" Periplus of the Red Sea "),
5244-515: The Arabs under the general 'Amr ibn al-'As invaded it during the Muslim conquest of Egypt , after a siege that lasted 14 months. The first Arab governor of Egypt recorded to have visited Alexandria was Utba ibn Abi Sufyan , who strengthened the Arab presence and built a governor's palace in the city in 664–665. In reference to Alexandria, Ibn Battuta speaks of a number of Muslim saints that resided in
5358-420: The Great in April 331 BC as Ἀλεξάνδρεια ( Alexandreia ), as one of his many city foundations . After he captured the Egyptian Satrapy from the Persians , Alexander wanted to build a large Greek city on Egypt's coast that would bear his name. He chose the site of Alexandria, envisioning the building of a causeway to the nearby island of Pharos that would generate two great natural harbours. Alexandria
5472-400: The Great Harbour. The names of a few other public buildings on the mainland are known, but there is little information as to their actual position. None, however, are as famous as the building that stood on the eastern point of Pharos island. There, The Great Lighthouse , one of the Seven Wonders of the World , reputed to be 138 m (453 ft) high, was situated. The first Ptolemy began
5586-423: The Red Sea and its coasts is extremely low, averaging 60 mm (2.36 in) per year. The rain is mostly short showers, often with thunderstorms and occasionally with dust storms . The scarcity of rainfall and no major source of fresh water to the Red Sea result in excess evaporation as high as 2,050 mm (81 in) per year and high salinity with minimal seasonal variation. A recent underwater expedition to
5700-437: The Red Sea inside the Bab al-Mandab , as the first fleet from Europe in modern times to have sailed these waters. Later in 1524 the city was delivered to Governor Heitor da Silveira as an agreement for protection from the Ottomans . In 1798, France ordered General Napoleon to invade Egypt and take control of the Red Sea. Although he failed in his mission, the engineer Jean-Baptiste Lepère , who took part in it, revitalised
5814-408: The Red Sea is dominated by persistent north-west winds , with speeds ranging between 7 km/h (4.3 mph) and 12 km/h (7.5 mph). The rest of the Red Sea and the Gulf of Aden are subjected to regular and seasonally reversible winds. The wind regime is characterized by seasonal and regional variations in speed and direction with average speed generally increasing northward. Wind
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#17328835568265928-465: The Red Sea offshore from Sudan and Eritrea found surface water temperatures 28 °C (82 °F) in winter and up to 34 °C (93 °F) in the summer, but despite that extreme heat, the coral was healthy with much fish life with very little sign of coral bleaching , with only 9% infected by Thalassomonas loyana , the 'white plague' agent. Favia favus coral there harbours a virus, BA3, which kills T. loyana . Scientists are investigating
6042-413: The Red Sea. The biblical Book of Exodus tells the account of the Israelites ' crossing of the sea , which the Hebrew text calls Yam Suph ( Hebrew : יַם סוּף ). Yam Suph was traditionally identified as the Red Sea. Rabbi Saadia Gaon (882‒942), in his Judeo-Arabic translation of the Pentateuch , identifies the crossing place of the Red Sea as Baḥar al-Qulzum , meaning the Gulf of Suez . In
6156-412: The Red Sea. The net value of the latter predominates, resulting in an overall drift to the north end of the Red Sea. Generally, the velocity of the tidal current is 50–60 cm/s (20–24 in/s) with a maximum of 1 m/s (3.3 ft/s) at the mouth of the al-Kharrar Lagoon. However, the range of the north-northeast current along the Saudi coast is 8–29 cm/s (3–11 in/s). The north part of
6270-400: The Rosetta Gate, but remnants of streets and canals were exposed in 1899 by German excavators outside the east fortifications, which lie well within the area of the ancient city. Alexandria consisted originally of little more than the island of Pharos, which was joined to the mainland by a 1,260 m-long (4,130 ft) mole and called the Heptastadion ("seven stadia"—a stadium was
6384-529: The Serapeum. Nearby, immense catacombs and columbaria have been opened which may have been appendages of the temple. These contain one very remarkable vault with curious painted reliefs, now artificially lit and open to visitors. The objects found in these researches are in the museum, the most notable being a great basalt bull, probably once an object of cult in the Serapeum. Other catacombs and tombs have been opened in Kom El Shoqafa (Roman) and Ras El Tin (painted). The German excavation team found remains of
6498-555: The Society for the Promotion of Hellenic Studies in 1895; and a German expedition worked for two years (1898–1899). But two difficulties face the would-be excavator in Alexandria: lack of space for excavation and the underwater location of some areas of interest. Since the great and growing modern city stands immediately over the ancient one, it is almost impossible to find any considerable space in which to dig, except at enormous cost. Cleopatra VII 's royal quarters were inundated by earthquakes and tsunami, leading to gradual subsidence in
6612-434: The Sultan of Egypt at the time, al-Nasir Muhammad . Ibn Battuta also visited the Pharos lighthouse on two occasions: in 1326 he found it to be partly in ruins and in 1349 it had deteriorated to the point that it was no longer possible to enter. During the Middle Ages , the Mamluk Sultanate provided amenities for European merchants to stay in the port cities of Alexandria and Damietta , so hotels were built and placed at
6726-418: The adjacent sabkhas, especially during storms. Winter mean sea level is 0.5 m (1.6 ft) higher than in summer. Tidal velocities passing through constrictions caused by reefs, sand bars and low islands commonly exceed 1–2 m/s (3–7 ft/s). Coral reefs in the Red Sea are near Egypt, Eritrea, Israel, Saudi Arabia, and Sudan. Detailed information regarding current data is lacking, partially because
6840-399: The ancient Mediterranean for much of the Hellenistic age and late antiquity . It was at one time the largest city in the ancient world before being eventually overtaken by Rome . The city was a major centre of early Christianity and was the centre of the Patriarchate of Alexandria , which was one of the major centres of Christianity in the Eastern Roman Empire . In the modern world,
6954-407: The area is recognized by the Egyptian government, which set up the Ras Mohammed National Park in 1983. The rules and regulations governing this area protect local marine life, which has become a major draw for diving enthusiasts who should be aware that although most Red Sea species are innocuous, a few are hazardous to humans. There is extensive demand for desalinated water to meet the needs of
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#17328835568267068-513: The base, tapering to 2.4 m (7.9 ft) at the top. The shaft is 88 ft (27 m) high and made out of a single piece of granite. Its volume is 132 m (4,662 cu ft) and weight approximately 396 tons. Pompey's Pillar may have been erected using the same methods that were used to erect the ancient obelisks . The Romans had cranes but they were not strong enough to lift something this heavy. Roger Hopkins and Mark Lehrner conducted several obelisk erecting experiments including
7182-411: The centre of the city, close to the point where the Sema (or Soma) of Alexander (his Mausoleum ) rose. This point is very near the present mosque of Nebi Daniel ; the line of the great East–West "Canopic" street is also present in modern-day Alexandria, having only slightly diverged from the line of the modern Boulevard de Rosette (now Sharae Fouad). Traces of its pavement and canal have been found near
7296-408: The citizens until they were discovered by accident in 1900. The most extensive ancient excavation currently being conducted in Alexandria is known as Kom El Deka . It has revealed the ancient city's well-preserved theater, and the remains of its Roman-era baths . The temple was built in the Ptolemy era and dedicated to Osiris, which finished the construction of Alexandria. It is located in Abusir,
7410-515: The city on 2 July 1798, and it remained in their hands until the arrival of a British expedition in 1801. The British won a considerable victory over the French at the Battle of Alexandria on 21 March 1801, following which they besieged the city , which fell to them on 2 September 1801. Muhammad Ali , the Ottoman governor of Egypt, began rebuilding and redevelopment around 1810 and, by 1850, Alexandria had returned to something akin to its former glory. Egypt turned to Europe in their effort to modernise
7524-413: The city. One such saint was Imam Borhan Oddin El Aaraj, who was said to perform miracles. Another notable figure was Yaqut al-'Arshi, a disciple of Abu Abbas El Mursi . Ibn Battuta also writes about Abu 'Abdallah al-Murshidi, a saint that lived in the Minyat of Ibn Murshed. Although al-Murshidi lived in seclusion, Ibn Battuta writes that he was regularly visited by crowds, high state officials, and even by
7638-471: The climate of Alexandria in the year 2050 would most closely resemble the current climate of Gaza City . The annual temperature would increase by 2.8 °C (5.0 °F), and the temperature of the warmest and the coldest month by 2.9 °C (5.2 °F) and 3.1 °C (5.6 °F). According to Climate Action Tracker , the current warming trajectory appears consistent with 2.7 °C (4.9 °F), which closely matches RCP 4.5. Due to its location on
7752-480: The coast and occasional other features such as cylinders (such as the Blue Hole (Red Sea) at Dahab ). The Red Sea also hosts many offshore reefs, including several true atolls. Many of the unusual offshore reef formations defy classic (i.e., Darwinian) coral reef classification schemes, and are generally attributed to the high levels of tectonic activity that characterize the area. Both offshore and coastal reefs are visited by pelagic species of fish, including many of
7866-1214: The coast of Africa ] and Aqaba [A line running from Ràs al Fasma Southwesterly to Requin Island ( 27°57′N 34°36′E / 27.950°N 34.600°E / 27.950; 34.600 ) through Tiran Island to the Southwest point thereof and thence Westward on a parallel (27°54'N) to the coast of the Sinai Peninsula ]. On the South. A line joining Husn Murad ( 12°40′N 43°30′E / 12.667°N 43.500°E / 12.667; 43.500 ) and Ras Siyyan ( 12°29′N 43°20′E / 12.483°N 43.333°E / 12.483; 43.333 ). Exclusive economic zones in Red Sea: Note: Hala'ib Triangle disputed between Sudan and Egypt and calculated for both. Red Sea has names in many languages (Modern Arabic : البحر الأحمر , romanized : al-Baḥr al-ʾAḥmar , Medieval Arabic: بحر القلزم , romanized: Baḥr al-Qulzum ; Biblical Hebrew : יַם-סוּף , romanized: Yam Sūp̄ or Hebrew : הַיָּם הָאָדוֹם , romanized : hayYām hāʾĀḏōm ; Coptic : ⲫⲓⲟⲙ ⲛ̀ϩⲁϩ Phiom Enhah or ⲫⲓⲟⲙ ⲛ̀ϣⲁⲣⲓ Phiom ǹšari ; Tigrinya : ቀይሕ ባሕሪ Qeyih Bahri ; Somali : Badda Cas ; Afar : "Qasa Bad". Red Sea
7980-493: The cooler months; these events, combined with a poor drainage system, have been responsible for occasional flooding in the city in the past though they rarely occur anymore. July and August are the hottest and driest months of the year, with an average daily maximum temperature of 30 °C (86 °F ). The average annual rainfall is around 211 mm (8.3 in) but has been as high as 417 mm (16.4 in) Port Said , Kosseir , Baltim , Damietta and Alexandria have
8094-421: The country. Greeks, followed by other Europeans and others, began moving to the city. In the early 20th century, the city became a home for novelists and poets. In July 1882, the city came under bombardment from British naval forces and was occupied. In July 1954, the city was a target of an Israeli bombing campaign that later became known as the Lavon Affair . On 26 October 1954, Alexandria's Mansheya Square
8208-587: The course of Roman rule in Egypt , the city's name was Latinised as Alexandrēa ad Aegyptum . After the capture of Alexandria by the Rashiduns in AD 641, the name was Arabicised : initial Al- was re-analysed into the definite article ; metathesis occurred on x , from [ks] to [sk] ; and the suffix -eia was assimilated into the feminine adjectival suffix -iyya ( ـِيَّة ). Radiocarbon dating of seashell fragments and lead contamination show human activity at
8322-464: The currents are weak and both spatially and temporally variable. The variation of temporal and spatial currents is as low as 0.5 m (1.6 ft) and are governed all by wind. During the summer, northwesterly winds drive surface water south for about four months at a velocity of 15–20 cm/s (6–8 in/s), whereas in winter the flow is reversed resulting in the inflow of water from the Gulf of Aden into
8436-450: The distinction of its population's three largest ethnicities: Greek, Egyptian and Jewish. By the time of Augustus , the city grid encompassed an area of 10 km (3.9 sq mi), and the total population during the Roman principate was around 500,000–600,000, which would wax and wane in the course of the next four centuries under Roman rule. According to Philo of Alexandria , in
8550-463: The easy overland connection between the Mediterranean and Red Seas and the lucrative trade in Egyptian cotton . Alexandria was located on the earlier Egyptian settlement, which was called Rhacotis ( Ancient Greek : Ῥακῶτις , romanized : Rhakôtis ), the Hellenised form of Egyptian r-ꜥ-qd(y)t . As one of many settlements founded by Alexander the Great, the city he founded on Rhacotis
8664-423: The effect of high salinity caused by evaporation in the north and relatively hot water in the south. The climate of the Red Sea is the result of two monsoon seasons: a northeasterly monsoon and a southwesterly monsoon. Monsoon winds occur because of differential heating between the land and the sea. Very high surface temperatures and high salinities make this one of the warmest and saltiest bodies of seawater in
8778-631: The erosion and accretion of the coastal rock exposure and the submerged coral beds. The Red Sea was formed by the Arabian Peninsula being split from the Horn of Africa by movement of the Red Sea Rift . This split started in the Eocene and accelerated during the Oligocene . The sea is still widening (in 2005, following a three-week period of tectonic activity it had grown by 8 m [26 ft]), and it
8892-488: The high-end ice sheet instability scenario. In every single estimate, Alexandria alone bears around half of these costs. Since sea level rise would continue for about 10,000 years under every scenario of climate change, future costs of sea level rise would only increase, especially without adaptation measures. Greek Alexandria was divided into three regions: Two main streets, lined with colonnades and said to have been each about 60 m (200 ft) wide, intersected in
9006-470: The largest cities ever built before the Industrial Revolution and the largest pre-industrial city that was not an imperial capital. Due to the constant presence of war in Alexandria in ancient times, very little of the ancient city has survived into the present day. Much of the royal and civic quarters sank beneath the harbour and the rest has been built over in modern times. " Pompey's Pillar ",
9120-593: The largest city in the world and, for some centuries more, was second only to Rome. It became Egypt's main Greek city, with Greek people from diverse backgrounds. The Septuagint , a Greek version of the Tanakh , was produced there. The early Ptolemies kept it in order and fostered the development of its museum into the leading Hellenistic centre of learning ( Library of Alexandria , which faced destruction during Caesar 's siege of Alexandria in 47 BC), but were careful to maintain
9234-477: The least temperature variation in Egypt. The highest recorded temperature was 45 °C (113 °F) on 30 May 1961, and the coldest recorded temperature was 0 °C (32 °F) on 31 January 1994. A 2019 paper published in PLOS One estimated that under Representative Concentration Pathway 4.5 , a "moderate" scenario of climate change where global warming reaches ~2.5–3 °C (4.5–5.4 °F) by 2100,
9348-468: The local Archaeological Society and by many individuals. Excavations were performed in the city by Greeks seeking the tomb of Alexander the Great without success. The past and present directors of the museum have been enabled from time to time to carry out systematic excavations whenever opportunity is offered; D. G. Hogarth made tentative researches on behalf of the Egypt Exploration Fund and
9462-510: The location during the period of the Old Kingdom (27th–21st centuries BC) and again in the period 1000–800 BC, followed by the absence of activity after that. From ancient sources it is known there existed a trading post at this location during the time of Rameses the Great for trade with Crete , but it had long been lost by the time of Alexander's arrival. A small Egyptian fishing village named Rhakotis ( Egyptian : rꜥ-qdy.t , 'That which
9576-399: The low grounds to northeast and southwest, where it is practically impossible to get below the Roman strata . The most important results were those achieved by Dr. G. Botti, late director of the museum, in the neighbourhood of "Pompey's Pillar", where there is a good deal of open ground. Here, substructures of a large building or group of buildings have been exposed, which are perhaps part of
9690-531: The major constituents of the Red Sea sediments are as follows: The Red Sea is a rich and diverse ecosystem. For example more than 1200 fish species have been recorded in the Red Sea, of which 10% are endemic, found nowhere else. Since the opening of the Suez Canal in November 1869, over a thousand marine species from the Red Sea—from plankton, seaweeds, invertebrates to fishes—have migrated northward and settled in
9804-523: The maritime explorations, during the reign of Darius the Great, a canal was constructed linking the Nile River to the northern end of the Red Sea at Suez. This canal is sometimes referred to as the ancient Suez Canal. It played a pivotal role in improving trade and communication between the Nile Valley and the Red Sea, and beyond to the Indian Ocean. This canal was a predecessor to the modern Suez Canal , which
9918-515: The merchants' disposal so that they could live according to the pattern they were accustomed to in their country. Alexandria lost much of its importance in international trade after Portuguese navigators discovered a new sea route to India in the late 15th century. This reduced the amount of goods that needed to be transported through the Alexandrian port, as well as the Mamluks' political power. After
10032-556: The names of the Ogdoad gods Heh and Hauhet ). Historically, it was also known to western geographers as Mare Mecca (Sea of Mecca), and Sinus Arabicus (Gulf of Arabia). Some ancient geographers called the Red Sea the Arabian Gulf or Gulf of Arabia. The association of the Red Sea with the biblical account of the Israelites crossing the Red Sea is ancient, and was made explicit in
10146-508: The northern Red Sea. The route had been used by previous states but grew in the volume of traffic under the Romans. From Indian ports goods from China were introduced to the Roman world. Contact between Rome and China depended on the Red Sea, but the route was broken by the Aksumite Empire around the 3rd century AD. From antiquity until the 20th-century , the Red Sea was also a trade route of
10260-510: The plan for a canal which had been envisaged during the reign of the Pharaohs . Several canals were built in ancient times from the Nile to the Red Sea along or near the line of the present Sweet Water Canal , but none lasted for long. The Suez Canal was opened in November 1869. During the first half of the 20th-century, the Red Sea slave trade attracted substantional international condemnation. After
10374-428: The population and the industries along the Red Sea. There are at least 18 desalination plants along the Red Sea coast of Saudi Arabia which discharge warm brine and treatment chemicals ( chlorine and anti-scalants ) that bleach and kill corals and cause diseases in the fish. This is only localized, but it may intensify with time and profoundly impact the fishing industry. The Red Sea serves an important role in
10488-414: The project, and the second Ptolemy ( Ptolemy II Philadelphus ) completed it, at a total cost of 800 talents . It took 12 years to complete and served as a prototype for all later lighthouses in the world. The light was produced by a furnace at the top and the tower was built mostly with solid blocks of limestone. The Pharos lighthouse was destroyed by an earthquake in the 14th century, making it
10602-556: The sea. The Red Sea is the world's northernmost tropical sea, and has been designated a Global 200 ecoregion. The International Hydrographic Organization defines the limits of the Red Sea as follows: On the North. The Southern limits of the Gulfs of Suez [A line running from Ràs Muhammed (27°43'N) to the South point of Shadwan Island (34°02'E) and thence Westward on a parallel (27°27'N) to
10716-521: The second island, Jadid, emerged in September 2013. Approximately 40% of the Red Sea is quite shallow at less than 100 m (330 ft) deep, with about 25% less than 50 m (160 ft) deep. Undiscovered oil reserves in the region have been estimated at 5,041 MMBO. Undiscovered gas reserves in the region have been estimated at 112,349 BCFG. Undiscovered natural gas reserves have been estimated at 3,077 MMBNGL. Most of these plays are controlled by
10830-496: The second longest surviving ancient wonder, after the Great Pyramid of Giza . A temple of Hephaestus also stood on Pharos at the head of the mole. In the 1st century, the population of Alexandria contained over 180,000 adult male citizens, according to a census dated from 32 AD, in addition to a large number of freedmen, women, children and slaves. Estimates of the total population range from 216,000 to 500,000, making it one of
10944-513: The site of the actual lighthouse having been weathered away by the sea. On the east of the mole was the Great Harbour, now an open bay; on the west lay the port of Eunostos, with its inner basin Kibotos, now vastly enlarged to form the modern harbour. In Strabo 's time (latter half of the 1st century BC), the principal buildings were as follows, enumerated as they were to be seen from a ship entering
11058-437: The south near the Gulf of Aden, but it fluctuates between 0.20 m (0.66 ft) and 0.30 m (0.98 ft) away from the nodal point. The central Red Sea (Jeddah area) is therefore almost tideless, and as such the annual water level changes are more significant. Because of the small tidal range the water during high tide inundates the coastal sabkhas as a thin sheet of water up to a few hundred metres rather than flooding
11172-469: The southern part and 41 ‰ in the northern part around the Gulf of Suez , with an average of 40 ‰. (Average salinity for the world's seawater is ~35 ‰ on the Practical Salinity Scale, or PSU; that translates to 3.5% of actual dissolved salts). In general, tide ranges between 0.6 m (2.0 ft) in the north, near the mouth of the Gulf of Suez and 0.9 m (3.0 ft) in
11286-621: The structure of the basin. Normal faults are common as the Red Sea occupies an active diverging margin. These targets are commonly found below the Salt deposits of the Middle Miocene . Modern development is focused on the following fields. The Durwara 2 Field was discovered in 1963, while the Suakin 1 Field and the Bashayer 1A Field were discovered in 1976, on the Egyptian side of the Red Sea. The Barqan Field
11400-442: The unique properties of these coral and their commensal algae to see if they can be used to salvage bleached coral elsewhere. The Red Sea is one of the saltiest bodies of water in the world, owing to high evaporation and low precipitation; no significant rivers or streams drain into the sea, and its southern connection to the Gulf of Aden , an arm of the Indian Ocean, is narrow. Its salinity ranges from between ~36 ‰ in
11514-468: The western suburb of Alexandria in Borg el Arab city. Only the outer wall and the pylons remain from the temple. There is evidence to prove that sacred animals were worshiped there. Archaeologists found an animal necropolis near the temple. Remains of a Christian church show that the temple was used as a church in later centuries. Also found in the same area are remains of public baths built by the emperor Justinian,
11628-481: The world. The average surface water temperature of the Red Sea during the summer is about 26 °C (79 °F) in the north and 30 °C (86 °F) in the south, with only about 2 °C (3.6 °F) variation during the winter months. The overall average water temperature is 22 °C (72 °F). Temperature and visibility remain good to around 200 m (660 ft). The sea is known for its strong winds and unpredictable local currents. The rainfall over
11742-520: The year 38 AD, disturbances erupted between Jews and Greek citizens of Alexandria during a visit paid by King Agrippa I to Alexandria, principally over the respect paid by the Herodian nation to the Roman emperor , which quickly escalated to open affronts and violence between the two ethnic groups and the desecration of Alexandrian synagogues. This event has been called the Alexandrian pogroms . The violence
11856-465: Was called Alexándreia hḗ kat' Aígypton ( Ἀλεξάνδρεια ἡ κατ' Αἴγυπτον ), which some sources translated as "Alexandria by Egypt", as the city was, at that time, in the periphery of Egypt proper (the area beside the Nile ). Some of the Alexandrian and Greek populaces, e.g., Hypsicles , also referred to the city as Alexándreia hḗ prós Aígypton ( Ἀλεξάνδρεια ἡ πρός Αἴγυπτον , "Alexandria near Egypt"). In
11970-514: Was closed to all swimming in December 2010 due to several serious shark attacks , including a fatality. As of December 2010, scientists are investigating the attacks and have identified, but not verified, several possible causes including over-fishing which causes large sharks to hunt closer to shore, tourist boat operators who chum offshore for shark-photo opportunities, and reports of ships throwing dead livestock overboard. The sea's narrowness, significant depth, and sharp drop-offs, all combine to form
12084-481: Was constructed in the 19th century and continues to be one of the world's most important waterways. The construction of the canal during Darius's reign is evidenced by ancient records, including inscriptions. Darius commemorated the completion of the canal by creating stelae (stone monuments) with inscriptions in several languages, describing the construction and its benefits. The canal not only facilitated trade but also solidified Darius's control over Egypt and enhanced
12198-589: Was devastated by a tsunami ( 365 Crete earthquake ), an event annually commemorated years later as a "day of horror". In 619, Alexandria fell to the Sassanid Persians . The city was mostly uninjured by the conquest and a new palace called Tarawus was erected in the eastern part of the city, later known as Qasr Faris, "fort of the Persians". Although the Byzantine emperor Heraclius recovered it in 629, in 641
12312-702: Was discovered in 1969, and the Midyan Field in 1992, both within the Midyan Basin on the Saudi Arabian side of the Red Sea. The 20-m thick Middle Miocene Maqna Formation is an oil source rock in the basin. Oil seeps occur near the Farasan Islands , the Dahlak Archipelago , along the coast of Eritrea, and in the southeastern Red Sea along the coasts of Saudi Arabia and Yemen. In terms of mineral resources
12426-472: Was founded originally in the vicinity of an Egyptian settlement named Rhacotis (that became the Egyptian quarter of the city). Alexandria grew rapidly, becoming a major centre of Hellenic civilisation and replacing Memphis as Egypt's capital during the reign of the Ptolemaic pharaohs who succeeded Alexander. It retained this status for almost a millennium, through the period of Roman and Eastern Roman rule until
12540-409: Was intended to supersede the older Greek colony of Naucratis as a Hellenistic centre in Egypt and to be the link between Greece and the rich Nile valley. A few months after the foundation, Alexander left Egypt and never returned to the city during his life. After Alexander's departure, his viceroy Cleomenes continued the expansion. The architect Dinocrates of Rhodes designed the city, using
12654-502: Was mainly in charge of overseeing Alexandria's early development, the Heptastadion and the mainland quarters seem to have been primarily Ptolemaic work. Inheriting the trade of ruined Tyre and becoming the centre of the new commerce between Europe and the Arabian and Indian East, the city grew in less than a generation to be larger than Carthage . In one century, Alexandria had become
12768-565: Was quelled after Caligula intervened and had the Roman governor, Flaccus, removed from the city. In 115 AD, large parts of Alexandria were destroyed during the Diaspora revolt , which gave Hadrian and his architect, Decriannus , an opportunity to rebuild it. In 215 AD, the emperor Caracalla visited the city and, because of some insulting satires that the inhabitants had directed at him, abruptly commanded his troops to put to death all youths capable of bearing arms. On 21 July 365 AD, Alexandria
12882-399: Was the lightly armed Muslim pilgrim convoys, rather than the well guarded cities of Mecca and Medina, and the belief in the Muslim world that Reynald was seeking to sack the holy cities, due to the proximity of those cities to the areas that Raynald raided. In 1513, trying to secure that channel to Portugal, Afonso de Albuquerque laid siege to Aden but was forced to retreat. They cruised
12996-401: Was the site of a failed assassination attempt on Gamal Abdel Nasser . Europeans began leaving Alexandria following the 1956 Suez Crisis that led to an outburst of Arab nationalism . The nationalisation of property by Nasser, which reached its highest point in 1961, drove out nearly all the rest. Alexandria is located in the country of Egypt, on the southern coast of the Mediterranean. It
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