The Topkapı Palace or the Seraglio, is a large palace in Istanbul, Turkey, that was one of the major residences of the Ottoman sultans for almost 400 years (1465–1856) of their 624-year reign. As well as a royal residence, the palace was a setting for state occasions and royal entertainments. It is now a museum and as such a major tourist attraction. It also contains important relics of the Muslim world, including Muhammed's cloak and sword.