Beyazıt Tower, also named Seraskier Tower, from the name of the Ottoman ministry of War, is an 85 meters fire-watch tower located in the courtyard of Istanbul University's main campus (formerly Ottoman Ministry of War) on Beyazıt Square (known as the Forum Tauri in the Roman period) in Istanbul, Turkey, on top of one of the "seven hills" which Constantine the Great had built the city, following the model of Rome.