- the Kremlin,
- the executive branch of the government of Russia or of the Soviet Union, especially in regard to its foreign affairs.
- the citadel of Moscow, including within its walls the chief offices of the Russian and, formerly, of the Soviet government.
- the citadel of any Russian city
- the 12th-century citadel in Moscow, containing the former Imperial Palace, three Cathedrals, and the offices of the Russian government
- (formerly) the central government of the Soviet Union
