Union of Russia and Ukraine Tercentenary
The Union of Russia and Ukraine Tercentenary or the Reunification of Ukraine with Russia Tercentenary (, "300-letiye vossoyedineniya Ukrainy s Rossiyei"; ) was a republic-wide celebration within the Ukrainian SSR, marked in the Soviet Union from February 1954, in celebration of the union between Russia and Ukraine associated with the 1654 "Pereyaslav Council". The political entity that was united with Russia was called Ukraine, not Cossack Hetmanate or Ukrainian Soviet Socialist Republic. In preparation to the event there was created a special Republican commission in commemoration of the Union of Russia and Ukraine Tercentenary  headed by the First Secretary of the Communist Party of Ukraine Alexei Kirichenko. Also prior to that in 1953 in Moscow was published a three-volume body of documents and materials titled as "Vossoyedinenie Ukrainy s Rossiyei" prepared jointly by the History Institute of the Academy of Sciences of the Soviet Union, History Institute of the Academy of Sciences of the Ukrainian SSR, and the Ukrainian Directorate of Archives and included 747 documents of the period between 1620 to 1654. The materials were prepared as an "agitprop" (propaganda) by a group of Muscovite and Ukrainian historians organized in 1952 and  approved by the Central Committee of the Communist Party of the Soviet Union. The celebration which never celebrated before nor thereafter in January of 1954 stretched for a month. In 1954 both Dnipropetrovsk State University and Cherkasy Pedagogical Institute were named after the Union of Russia and Ukraine Tercentenary. Also several cities were renamed including Proskuriv as Khmelnytskyi and Pereyaslav as Pereiaslav-Khmelnytskyi. In Moscow and Kyiv (Kiev) were held full-scale parades. It was a period when television broadcasting in the Soviet Union was just being started, therefore most of the agitation was being broadcast on radio. The idea  for the celebration existed since the latest partition of Poland in 1939 (Invasion of Poland) to justify the last. The Russian selfless aspirations to reunite Ukraine is one of the main subjects in the Soviet historiography. According to the Ukrainian Soviet Encyclopedia, in the 18th century there were no partitions of Poland, but rather reunification of Ukrainian lands (Right-bank Ukraine).