Knowra History of the Eastern Orthodox Church History of the Eastern Orthodox Church The history of Eastern Orthodox Christianity traces the development of its theology, institutions, liturgy, and churches from early Christianity through the present.
Early Christianity : The diverse movement centered on Jesus that developed into Christianity during the first centuries CE. Orthodox tradition locates its origins in the earliest Christian communities and their apostolic succession.
Ecumenical council : A major council of bishops recognized as authoritative across the Christian church. Orthodox doctrine was defined through councils rather than a single central teaching office.
Fall of Constantinople : The Ottoman conquest of Constantinople in 1453, ending the Byzantine Empire. It ended imperial Byzantine patronage and changed the church’s political setting.
Roman Catholic Church : The Christian communion led by the bishop of Rome, with a global hierarchy centered on the papacy. The separation from Rome involved competing accounts of papal authority and doctrinal development.
Eastern Orthodox Church : A communion of self-governing churches sharing Orthodox doctrine, sacramental life, and liturgical tradition. Its present structure is the outcome of the historical developments traced across this page.
Council of Nicaea : The first ecumenical council, held in 325, which addressed Arianism and issued the Nicene Creed. Its creed became a lasting foundation of Orthodox doctrine.
Patriarchate of Constantinople : The ancient Christian see of Constantinople, holding primacy of honor among Eastern Orthodox churches. Its influence grew with the imperial capital, while its primacy remained distinct from papal rule.
Ottoman Empire : A Muslim-ruled empire that governed much of southeastern Europe, western Asia, and northern Africa from the fourteenth century to 1922. Orthodox Christians lived under Ottoman rule for centuries, with communal institutions shaped by imperial policy.
Oriental Orthodox Churches : A family of churches that rejected the Council of Chalcedon’s formulation of Christ’s two natures. Their split from the Byzantine church followed fifth-century disputes, distinct from the later rupture with Rome.
Orthodox Church of Ukraine : An autocephalous Eastern Orthodox church established in Ukraine in 2018 and recognized by Constantinople. Its status has intensified disputes over who can grant autocephaly and how other churches recognize it.
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