The passage tower of the Moscow Kremlin overlooking Red Square. It was built according to the design of the architect Pietro Antonio Solari. Until the end of the 15th century, that is, before the creation of Red Square, Nikolskaya Street began from the Nikolsky Gate. In 1805–1806, the tower was completely rebuilt in the Gothic style by the architect Luigi Rusca together with Alexei Bakarev. In 1816–1819, under the leadership of the architect Osip.