Oriental Orthodox Christianity

Overview: Oriental Orthodox Christianity refers to the communion of ancient Eastern churches that accept the first three ecumenical councils and reject the definition of Chalcedon in 451 as it was historically received in the Byzantine and Latin worlds. These churches include, in different contexts, the Coptic Orthodox Church, the Syriac Orthodox Church, the Armenian Apostolic Church, the Ethiopian Orthodox Tewahedo Church, the Eritrean Orthodox Tewahedo Church, and the Malankara Orthodox Syrian Church. In comparative studies, it is important to distinguish them both from Byzantine Orthodoxy and from the ancient Eastern churches of the Persian tradition.

Origin and development: Their roots lie in the ancient Christian communities of Egypt, Syria, Armenia, Ethiopia, and India. The historical separation from the Chalcedonian tradition took shape after the Christological controversies of the fifth and sixth centuries, although modern dialogues have shown that part of the ancient conflict also involved language, imperial politics, conciliar reception, and mutual suspicion. These churches preserved episcopal succession, sacramental life, strong monasticism, their own liturgies, and extensive patristic production.

Central beliefs: Their most notable traits include the miaphysite Christology associated especially with the language of Cyril of Alexandria, acceptance of Nicaea, Constantinople I, and Ephesus, strong veneration of the Theotokos, the centrality of the Eucharist, the value of fasting, monasticism, veneration of saints, and continuity of Sacred Tradition. Many of these churches prefer to describe their Christological faith as the full union of Christ's divinity and humanity in the one incarnate nature of the Word, and they reject being labeled simply as monophysite in a simplified heresiological sense.

Practices and diversity: The communion includes diverse liturgical and linguistic families such as Coptic, Syriac, Armenian, Ge'ez, and Malankara. Spirituality often values long offices, a calendar rich in fasts, devotion to saints, sacramental discipline, pilgrimage, and strong ecclesial identity. In some churches, local traditions, classical languages, and national inheritances play a very important role.

Debates and comparison: In comparison with Byzantine Orthodoxy and Roman Catholicism, there is broad sacramental, patristic, liturgical, and ascetical convergence, but also historical divergence over Chalcedon and the enumeration of universally normative councils. Contemporary dialogues among Oriental Orthodox, Byzantine Orthodox, and Catholics have identified significant Christological proximity, although full communion has not yet been restored. When addressing the topic, it is helpful to distinguish the communion's shared official belief, the particular practices of each church, and apologetic explanations that emerged in modern contexts.