Topkapı Palace, which from 15th to 19th century, was residence of Ottoman Sultans. Today it’s a museum where you can have the chance to see, imperial treasury including the Spoonmaker’s Diamond, the 3rd largest in the world, sacred Islamic relics that belongs to prophet Mohammed and his followers. In the Palace visit the Harem Apartments were where the sultans lived together with their families. (Harem is not included in the program and visit is due to extra entrance fee.)