The south-western corner of the Kremlin is guarded by Vodovzvodnaya Tower. It is one of the most beautiful buildings of the complex. The tower was built in 1488. First it was called Sviblova, after the boyars Sviblovs, whose yard was adjacent to the tower from the Kremlin side. The current tower’s name was given in 1633 after installation of the machine to pump water from the Moskva River in the Kremlin. In the end of the 17th century the hipped roof was erected on the tower.