The only surviving bridgehead tower of the Kremlin was built in 1516 by Aleviz the Old at the same time as the bridge leading to the Trinity Tower. He also built other towers and walls of the fortress on the Neglinka side. Until the 17th century, the tower was surrounded on all sides by water and served as a serious obstacle to attackers. The tower was once covered by a vault, but it was dismantled in the 18th century. The origin of the name is not entirely clear and is associated with one of two words: kut – corner, shelter and kutafya – a plump, clumsy woman.