Istanbul is the largest city of Turkey, the largest city proper (and second largest metropolitan area) in Europe, and the third largest city proper in the world. The city covers 27 districts of the Istanbul province. It is located on the Bosphorus Strait and encompasses the natural harbor known as the Golden Horn, in the northwest of the country. It extends both on the Europe (Thrace) and on the Asia (Anatolia) side of the Bosphorus, and is thereby the only metropolis in the world which is situated on two continents. In its long history, Istanbul served as the capital city of the Roman Empire (330–395), the East Roman (Byzantine) Empire (395–1204 and 1261–1453), the Latin Empire (1204–1261), and the Ottoman Empire (1453–1922). The city was chosen as joint European Capital of Culture for 2010. The historic areas of Istanbul were added to the UNESCO World Heritage List in 1985.
Istanbul is located in the north-west Marmara Region of Turkey. It encloses the southern Bosphorus which places the city on two continents—the western portion of Istanbul is in Europe, while the eastern portion is in Asia. The city boundaries cover a surface area of 1,830.92 square kilometres (707 sq mi), while the metropolitan region, or the Province of Istanbul, covers 6,220 square kilometres (2,402 sq mi).
Istanbul is situated near the North Anatolian fault line, which runs from northern Anatolia to the Marmara Sea. Two tectonic plates, the African and the Eurasian, push against each other here. This fault line has been responsible for several deadly earthquakes in the region throughout history. In 1509 a catastrophic earthquake caused a tsunami which broke over the sea-walls of the city, destroying over 100 mosques and killing 10,000 people. In 1766 the Eyüp Sultan Mosque was largely destroyed. The 1894 earthquake caused the collapse of many parts of the Grand Bazaar. A devastating earthquake on August 17, 1999, with its epicenter in nearby Izmit, left 18,000 dead and many more homeless. In all of these earthquakes, the devastating effects are a result of the building density and poor construction of buildings. Seismologists predict another earthquake, possibly measuring magnitude 7.0, occurring before 2025. |
