Kremlin

The Kremlin was walled area of Moscow which served as an important political centre throughout Russian history. (AUDIO: Singularity, Mother Russia, et al.) It was accessed via gates at the Red Square and consisted of a multitude of buildings, including an arsenal, churches and a great palace. (AUDIO: Mother Russia)

History
In 1812, the First Doctor, Steven Taylor and Dodo visited the Kremlin along with Napoléon Bonaparte after he conquered the city. (AUDIO: Mother Russia)

Turlough was told by the Fifth Doctor that he was not welcome in the Kremlin. (AUDIO: Singularity) This could have been because of his visit to the Kremlin centuries earlier. (AUDIO: Thin Ice)

The brothers Yevgeni and Yasha Lemayev worked at the Kremlin. (AUDIO: Thin Ice)

The Council House on Kirith reminded Ace of the faraway majesty of the Kremlin. (PROSE: Timewyrm: Apocalypse)

In July 1966, Kremlin was among the computer systems which were to be connected to WOTAN on C-Day on 16 July, an event which was ultimately cancelled following WOTAN's failed attempt to take over London. (TV: The War Machines)

The Twelfth Doctor once said that the Kremlin would be one of the hardest places on Earth to break into, due to "big fences, shouty people and cross dogs." (TV: The Return of Doctor Mysterio)