Istanbul has been the capital of three great empires over 1600 years. It was officially conquered by the Ottomans in 1453 and became their capital, renamed from Constantinople to Istanbul. As the largest city in Turkey, Istanbul straddles Europe and Asia with a strategic location and varied climate. It has a long history and is renowned for its palaces, mosques, bazaars and museums, making it a popular tourist destination with much to see and experience.