Moscow Kremlin in the context of "Moscow Kremlin Museums"

Tsar (/zɑːr, (t)sɑːr/; also spelled czar, tzar, or csar; Bulgarian: цар, romanized: tsar; Russian: царь, romanized: tsar'; Serbian: цар, car) is a title historically used by Slavic monarchs. The term is derived from the Latin word caesar, which was intended to mean emperor in the European medieval sense of the term—a ruler with the same rank as a Roman emperor, holding it by the approval of another emperor or a supreme ecclesiastical official—but was usually considered by Western Europeans to be equivalent to "king".

Tsar and its variants were the official titles in the First Bulgarian Empire (681–1018), Second Bulgarian Empire (1185–1396), the Kingdom of Bulgaria (1908–1946), the Serbian Empire (1346–1371), and the Tsardom of Russia (1547–1721).The first ruler to adopt the title tsar was Simeon I of Bulgaria. Simeon II, the last tsar of Bulgaria, is the last person to have held this title.

The Third Moscow Conference between the major Allies of World War II took place during October 18 to November 11, 1943, at the Moscow Kremlin and Spiridonovka Palace. It was composed of major diplomats, ministers and generals, who discussed cooperation in the war effort, and issued the Moscow Declaration.

In Eastern Christianity, an iconostasis (Greek: εἰκονοστάσιον) is a wall of icons and religious paintings, separating the nave from the sanctuary in a church. Iconostasis also refers to a portable icon stand that can be placed anywhere within a church. The iconostasis evolved from the Byzantine templon, a process complete by the 15th century.

A direct comparison for the function of the main iconostasis can be made to the layout of the great Temple in Jerusalem. That Temple was designed with three parts. The holiest and inner-most portion was that where the Ark of the Covenant was kept. This portion, the Holy of Holies, was separated from the second larger part of the building's interior by a curtain, the "veil of the temple". Only the High Priest was allowed to enter the Holy of Holies. The third part was the entrance court.

The Urban Diocese of Moscow (Russian: Московская городская епархия) is a conventional name of church administrative institution of Russian Orthodox Church in the city of Moscow. The head of the diocese (eparchy) is the Patriarch of Moscow and All Rus'.

The diocese consists of stauropegic monasteries, cathedrals and churches of Moscow Kremlin, and parish churches, divided into 10 vicariates, which are, in turn, divided into 27 blagochiniyes (deaneries).

The 1917–1918 Local Council of the Orthodox Church of Russia (Russian: Поместный собор Православной российской церкви) was the first Local Council of the Russian Church since the end of the 17th century. It opened on 15 August 1917 (O.S.) in the Assumption Cathedral of the Moscow Kremlin. Its most important decision was to restore the Patriarchate in the Russian Church, thereby ending a period of c. 300 years when the Russian Church was governed directly by the Emperor through the Most Holy Synod as a result of Peter the Great's ecclesiastical reforms.

The Grand Kremlin Palace (Russian: Большой Кремлёвский дворец, romanized: Bolshoy Kremlyovskiy dvorets) is a building in the Moscow Kremlin. For much of the 19th century, it served as the official residence of the Russian emperor in Moscow, which was not then the capital of the Russian Empire. Designed by a team of architects under the management of Konstantin Thon, architect of the Kremlin Armoury and the Cathedral of Christ the Saviour, the palace was intended to emphasise the greatness of Russian autocracy.

The Grand Kremlin Palace serves as the official working residence of the president of Russia and also houses a museum.

Red Square (Russian: Красная площадь, romanized: Krasnaya ploshchad', IPA: [ˈkrasnəjə ˈploɕːɪtʲ]) is one of the oldest and largest squares in Moscow, Russia. It is located in Moscow's historic centre, along the eastern walls of the Kremlin. It is the city's most prominent landmark, with famous buildings such as Saint Basil's Cathedral, Lenin's Mausoleum, the State Historical Museum and the GUM department store. It has been a UNESCO World Heritage Site since 1990. Red Square has been the scene of executions, demonstrations, riots, parades, and speeches. Almost 73,000 square metres (800,000 square feet), it lies directly east of the Kremlin and north of the Moskva River. A moat that separated the square from the Kremlin was paved over in 1812.

The nomenklatura (Russian: номенклату́ра; from Latin: nomenclatura, system of names) were a category of people within the Soviet Union and other Eastern Bloc countries who held various key administrative positions in the bureaucracy, running all spheres of those countries' activity: government, industry, agriculture, education, etc., whose positions were granted only with approval by the communist party of each country or region. While in the Russian language the term номенклатура has the same generic meaning as "nomenclature", in the context of the politics of the Soviet Union it refers to the "party and state nomenklatura", lists of persons vetted for key management, or "nomenklatura lists".