Istanbul, Turkey's largest city, has historically served as the capital of the Roman, Byzantine, Latin, and Ottoman Empires due to its strategic location between Europe and Asia. As the only city located on two continents, Istanbul has experienced a long history of conquests and rebuilding efforts. Today, Istanbul remains Turkey's cultural and economic center, though the capital was moved to Ankara in 1923, and over 13 million people call it home, making it one of the largest cities in Europe.