Russian Orthodox Old-Rite Church references on wikipedia
Russian_Orthodox_Old-Rite_Church The Russian Orthodox Old-Rite Church (or Russian Orthodox Oldritualist Church, Russian Orthodox Old-Ritualist Church) () is an Eastern Orthodox Church of the Old Believers tradition, born from a schism within the Russian Orthodox Church following the liturgical reforms of Patriarch Nikon in the second half of 17th century (Old Believers). She is one of the two Old Believers churches that belong to the Belokrinitskaya Hierarchy - together with the Orthodox Old-Rite Church, sometimes also called Lipovan Orthodox Old-Rite Church.