The city of Istanbul, which extends on both the European and Asian sides of the Bosporus strait, is the only city in the world to span 2 continents. Over the centuries, this area has been under Greek, Roman, Ottoman, and Turkish control. One of the great historic metropolises of the world, Istanbul is Turkey’s chief city and seaport as well as its commercial, industrial, and financial center. Istanbul is home to Topkapi Palace, the Hagia Sophia, and what other historic sites? Discuss