Russian Orthodox Old-Rite Church

The Russian Orthodox Old-Rite Church (or Russian Orthodox Oldritualist Church, Russian Orthodox Old-Ritualist Church, Russian: Русская Православная Старообрядческая Церковь) is an Eastern Orthodox Church of the Old Believers tradition, which rejected the liturgical and canonical reforms of Patriarch Nikon in the second half of 17th century. It 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.

Source: Wikipedia — Russian Orthodox Old-Rite Church (CC BY-SA 4.0)