The highest tower of the Kremlin - Troitskaya – on a value was considered as the second after Spasskaya. It was built in 1495. The tower has got six stages, in its basis - a two-story cellar with powerful walls. All stages are connected with each other by ladders. Originally the tower was called Bogojavlenskaya, then Znamenskaya, Kuretnaya. Under the decree of tsar Alexey Mihailovicha in 1658 it began to be called Troitskaya because of the Troitsk monastic farmstead that was nearby.
In 1516 there was constructed a stone bridge through the river Neglinnaja which connected the Troitskaya tower with sentry tower Kutafja. Tower gates ministered in transit to rooms of the tsarina, to a court yard of the patriarch, a clergy was going through them to meet the tsar who was coming back from campaigns.
In 1685 a tower was built on by a many-tier top, reminding the top of the Spasskaya tower by its outlines. In 1686 a chiming clock was established on a tower. After a fire in Moscow of 1812 the hurt chiming clock was not restored any more. In XIX century the archive of the ministry of an imperial court yard took places in a tower.
In 1937 a ruby star was established on the Troitskaya tower.
Height of a tower to the star from the Kremlin - 65.65 meters, with the star - 69.3 meters. From the Aleksandrovsky garden the height of the tower to the star makes 76.35 meters, with the star - 80 meters.