All-Ukrainian Congress of Soviets

The All-Ukrainian Congress of Soviets (Ukrainian: Всеукраїнський з'їзд Рад, romanized: Vseukraïns'kyy zyizd Rad, Russian: Всеукраинский съезд Советов, romanized: Vseukrainskiy syezd Sovetov) was the supreme governing body of the Ukrainian Soviet Socialist Republic from 1917 to 1938. From 1922 to 1938 the Constitution of the Ukrainian SSR, modeled on the 1918 Russian Constitution, mandated that Congress to be convened at least twice a year.

Source: Wikipedia — All-Ukrainian Congress of Soviets (CC BY-SA 4.0)