Renovationism

250px|thumb|The Renovationist Synod in 1926. Sitting (from left to right): bishops George Zhuk, George Dobronravov, Alexander Vvedensky, Benjamin Muratovsky, Seraphim Ruzhentsov, Alexius Bazhenov and protopresbyter Pavel Krasotin. Standing: Archpriest Nikolai Popov, Professor Sergey Zarin, Professor [[Boris Titlinov, Archdeacon Sergey Dobrov.]] Renovationism (; from 'renovation, renewal')—also called the Renovated Church () or, by metonymy, the Living Church ()—officially named Orthodox Russian Church (), and later Orthodox Church in the USSR (), was the schism in the Russian Orthodox Church, sanctioned by the Soviet authorities, the movement ceased operations in the late 1940s. In 1927, the movement was blessed by the future Patriarch Sergius of Moscow, a political move that enabled the reformation of the modern Russian Orthodox Church in 1943 by Sergius (Stragorodsky).

This movement originally began as a grassroots movement among the Russian Orthodox clergy for the reformation of the Church, but was quickly influenced by the support of the Soviet secret services (Cheka, then GPU, NKVD), which had hoped to split and weaken the Russian Church by instigating schismatic movements within it. The beginning of actual schism is usually considered to be in May 1922, when a group of Renovationist clergy laid claims to higher ecclesiastical authority in the Russian Church. Three days after the establishment of the new Church, the Soviet authorities arrested Patriarch Tikhon of Moscow on May 19. Both factions were calling each other names "Renovationites" and "Tikhonovites" (). The movement is considered to have ended with the death of its leader, Alexander Vvedensky, in 1946, although the last unrepentant Renovationist hierarch, Philaret (Yatsenko), died in 1951.