a Christian church or federation of churches originating in the Greek-speaking church of the Byzantine Empire, not accepting the authority of the pope, and using ancient forms of service
the Eastern Orthodox Church, which uses the Byzantine rite in Greek, in particular the national Church of Greece
another name for Orthodox Church.
an independent Christian Church established in Armenia since circa 300 and influenced by Roman and Byzantine as well as Syrian traditions. A small Armenian Catholic Church also exists (see Uniate)
a Christian church or federation of churches originating in the Greek-speaking church of the Byzantine Empire, not accepting the authority of the pope, and using ancient forms of service