Constantinople was a historical city located on a peninsula at the southeastern tip of Thrace in Europe; with the Bosporus strait and the ancient cities of Chalcedon and Chrysopolis in Bithynia, Anatolia to the east; the Golden Horn and the citadel of Galata (Pera) to the north; the Sea of Marmara to the south; and the Princes' Islands to the southeast. Constantinople served as the capital of the Roman, Byzantine, Latin, and Ottoman Empires between its consecration in 330 and the formal abolition of the Ottoman sultanate in 1922.