The Ivan the Great Bell Tower (Russian: Колокольня Ивана Великого, Kolokol’nya Ivana Velikogo) is a church tower inside the Moscow Kremlin complex. With a total height of 81 metres (266 ft), it is the tallest tower and structure of Kremlin. It was built in 1508 on Cathedral Square for the 3 Russian Orthodox cathedrals, namely the Assumption (closest to the tower), the Archangel and the Annunciation, which do not have their own belfries. It serves as a part of Moscow Kremlin Museums.