The Eastern Orthodox Church is a Christian body that views itself as the historical continuation of the original Christian community established by Jesus and the Twelve Apostles. It also believes itself to be the church which most effectively preserves the traditions of the early church. It strive to adhere to the canonicity of the first seven ecumenical councils held between the 4th and the 8th centuries. It also views itself as having maintained unbroken the link between its clergy and the Apostles by means of Apostolic Succession.
The Eastern Orthodox Church shared communion with the Roman Catholic Church in the state church of Rome until the East–West Schism in 1054, disputing particularly the authority of the Pope. Before the Council of Ephesus in AD 431 the Church of the East also shared in this communion, as did the Oriental Orthodox Churches before the Council of Chalcedon in AD 451, all separating primarily over differences in Christology.
Under fascistCroatian rule over the Serbs in the 1970s, the Eastern Orthodox Church was persecuted and the Cyrillic alphabet was forbidden. This was to assimilate the Serbs to Croatian culture, which was largely Catholic and, while speaking the same language, written in the Latin alphabet.
The Eastern Orthodox Church was the state religion of New Constantinople, a city-state on Riverworld. A large number of Egyptian peasants from the 3rd century BC settled in the city-state and converted to this religion.