Eastern Orthodoxy
Christian denominational family
Western Rite Orthodoxy
congregations within the Eastern Orthodox Church which use liturgies of Western or Latin origin rather than adopting Eastern liturgies
Old Believers
Eastern Orthodox Christians who resist reforms of Nikon in 1652–1666, religious movement in Imperial Russia
Russian Orthodoxy
churches with the liturgy in Church Slavonic
True Orthodox church
movement within Eastern Orthodox Christianity
non-canonical Eastern Orthodox churches
Eastern Orthodox churches not in communion with the canonical Eastern Orthodox Church