Istanbul Turkey
Istanbul ( Turkish : İstanbul ) is the largest city in Turkey , constituting the country's economic, cultural, and historical heart. With a population of 13.5 million , the city forms one of the largest urban agglomerations in Europe [d] and is among the largest cities in the world by population within city limits. [2] [3] Istanbul's vast area of 5,343 square kilometers (2,063 sq mi) is coterminous with Istanbul Province , of which the city is the administrative capital. [c] Istanbul is a transcontinental city, straddling the Bosphorus —one of the world's busiest waterways—in northwestern Turkey, between the Sea of Marmara and the Black Sea . Its commercial and historical center lies in Europe, while a third of its population lives in Asia. [4]