Old Believers
Old Believers or Old Ritualists are Eastern Orthodox Christians who maintain the liturgical and ritual practices of the Russian Orthodox Church as they were before the reforms of Patriarch Nikon of Moscow between 1652 and 1666. Wikipedia
Bezpopovtsy: Pomorian Old-Orthodox Church; Novopomortsy; Staropomortsy; Fedoseevtsy; Filippians
Founder: Anti-reform dissenters
Language: Russian, Church Slavonic
Liturgy: Byzantine Rite (Russian modified)
Origin: 1652/1658–1685; Tsardom of Russia
Region: 15 or 20 countries