Istanbul (Turkish: Ä°stanbul) is the most populous city in Turkey, and the country's economic, cultural, and historical center.
Istanbul is a transcontinental city in Eurasia, straddling the Bosphorus strait between the Sea of Marmara and the Black Sea.
Its commercial and historical center lies on the European
side and about a third of its population lives on the Asian side.
The city is the administrative center of the Istanbul Metropolitan Municipality (coterminous with Istanbul Province),
both hosting a population of around 14 million residents.
Istanbul is one of the world's most populous cities and ranks as world's 5th-largest city proper and the largest European city.