Saviour', which was created in the 16th century on the outside wall of tower, plastered over in 1937, but reopened and restored in 2010. The Spasskaya Tower was the first tower of the many Moscow Kremlin Towers to be crowned with the hipped roof in 1624–1625 by architects Bazhen Ogurtsov and Christopher Galloway (a Scottish architect and clock maker). According to a number of historical accounts, the clock on the Spasskaya Tower appeared between 1491 and 1585. It is usually referred to as the Kremlin chimes (Кремлёвские куранты) and designates official Moscow Time. The clock face has a diameter of . The gate of Spasskaya Tower was used to greet foreign dignitaries, and was used during formal ceremonies or processions held on Red Square. Senatskaya The Senatskaya Tower () was built in 1491 by an architect Pietro Antonio Solari and was purely defensive in nature: it guarded the Kremlin on the Red Square side. For a long time it remained nameless. It was only in 1787, after architect Matvei Kazakov constructed the Kremlin Senate on the Kremlin’s territory, that it was given its present name. The dome of the Senate can be seen from Red Square. Inside the central part of the tower there are three tiers of vaulted chambers. In 1860, the flat tower was topped with a stone tent roof crowned, in turn, with a gilt weather vane. The tower contains a through-passage that allows VIPs to travel from the kremlin to Red Square. Its height is . Geographical coordinates: . Nikolskaya The Nikolskaya Tower () is a tower with a through-passage on the eastern wall of the Moscow Kremlin, which overlooks the Red Square not far from the State Historical Museum. The Nikolskaya Tower was built in 1491 by an Italian architect Pietro Antonio Solari. It was named after Nikolaevsky (Nikolsky) Greek Monastery, which is no longer there. In 1806, the tower was rebuilt in the neo-Gothic style by an architect Luigi Rusca. In 1812, the top of the tower was blown up by the retreating French army. It was restored in 1816 by an architect Osip Bove. The Nikolskaya Tower was once again severely damaged by the artillery fire in October 1917 and was later restored by an architect Nikolai Markovnikov. In 1935, the Soviets installed a red star on top of the tower. Its current height with the star is . The original icon of