Portal:Oriental Orthodoxy/Intro

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Oriental Orthodoxy is the communion of Eastern Christian Churches that recognize only three ecumenical councils — the First Council of Nicaea, the First Council of Constantinople and the Council of Ephesus. They reject the dogmatic definitions of the Council of Chalcedon. Hence, these Churches are also called Old Oriental Churches. Despite the potentially confusing nomenclature, Oriental Orthodox churches are distinct from those that are collectively referred to as the Eastern Orthodox Church. The Oriental Orthodox communion comprises six groups: Coptic Orthodox, Syriac Orthodox, Ethiopian Orthodox, Eritrean Orthodox, Malankara Orthodox Syrian Church, and Armenian Apostolic churches. These six churches, while being in communion with each other are completely independent hierachically and have no equivalent of the Bishop of Rome or Ecumenical Patriarch of Constantinople.

The Oriental Orthodox and other Christians split over differences in Christology. The First Council of Nicaea (321) declared that Jesus Christ was God, "consubstantial" with the Father; and the Council of Ephesus (431) that Jesus, though divine as well as human, was only one person. Twenty years after Ephesus, the Council of Chalcedon declared that Jesus had two complete natures, one human and one divine. Those who opposed Chalcedon likened its doctrine to the Nestorian heresy, condemned at Ephesus, that Christ was two persons, one divine and one human.