All-Union Congress of Soviets (Cherry, Plum, and Chrysanthemum)

The Congress of Soviets of the Union of Soviet Socialist Republics (Russian: Съезд Советов СССР Syezd Sovétov SSSR) is the supreme body of state authority of the Soviet Union consisting of two chambers, each with equal legislative powers: the Soviet of the Union and the Soviet of the Nationalities. The Congress of Soviets is the only Soviet governmental institution with the powers to pass constitutional amendments.

The Congress of Soviets gathers twice a year and electing the Central Executive Committee of the USSR, consisting of a smaller number of deputies, to serve as the Soviet national legislature on its behalf while the Congress was not in session. The Central Executive Committee deciding all but the most important issues, such as amendments to the Soviet constitution, which are left to the full Congress only.