Anastas Mikoyan, Soviet politician, Chairman of the Presidium of the Supreme Soviet of the Soviet Union (died 1978)

Anastas Ivanovich Mikoyan was a Soviet statesman, diplomat, and Bolshevik revolutionary who served as the Chairman of the Presidium of the Supreme Soviet, the head of state of the Soviet Union. As a member of the Communist Party's Central Committee from 1923 to 1976, he was the only Soviet politician who remained in power from Lenin, through the eras of Stalin and Khrushchev, to his retirement under Brezhnev. His longevity inspired the popular Russian saying "from Ilyich [Lenin] to Ilyich [Brezhnev] without heart attack and paralysis".

The Constitution of the Soviet Union recognised the Presidium of the Supreme Soviet and the earlier Central Executive Committee (CEC) of the Congress of Soviets as the highest organs of state authority in the Union of Soviet Socialist Republics (USSR) between legislative sessions. Under the 1924, 1936 and 1977 Soviet Constitutions these bodies served as the collective head of state of the Soviet Union. The chairman of these bodies personally performed the largely ceremonial functions assigned to a single head of state but was provided little real power by the constitution.

The Presidium of the Supreme Soviet was the standing organ of the highest body of state authority in the Union of Soviet Socialist Republics (USSR). The presidium was elected by joint session of both houses of the Supreme Soviet to act on its behalf while the Supreme Soviet was not in session. By the 1936 and 1977 Soviet Constitution, the Presidium of the Supreme Soviet served as the collective head of state of the USSR. In all its activities, the Presidium was accountable to the Supreme Soviet of the USSR.

The Union of Soviet Socialist Republics (USSR), commonly known as the Soviet Union, was a transcontinental country that spanned much of Eurasia from 1922 until it dissolved in 1991. During its existence, it was the largest country by area, extending across eleven time zones and sharing borders with twelve countries, and the third-most populous country. An overall successor to the Russian Empire, it was nominally organized as a federal union of national republics, the largest and most populous of which was the Russian SFSR. In practice, its government and economy were highly centralized. As a one-party state governed by the Communist Party of the Soviet Union (CPSU), it was the flagship communist state. Its capital and largest city was Moscow.