011st–3rd Centuries
The Apostolic Foundations
The Orthodox Church understands its history as beginning at Pentecost, when the Holy Spirit descended upon the apostles and the Church was manifest to the world.
Early missionary journeys carried the gospel throughout the Roman Empire — from Jerusalem to Antioch, Alexandria, and Rome — establishing the first local churches governed by bishops in apostolic succession.
During this era Christians endured periodic persecutions, yet the faith spread rapidly through martyrdom, catechesis, and the emergence of the New Testament canon.
024th Century
An Empire Transformed
The Edict of Milan in 313 granted religious tolerance, ending imperial persecutions and allowing the Church to worship openly.
The First Ecumenical Council in Nicaea (325) affirmed that the Son is "of one essence" with the Father, giving the Church the Nicene Creed.
Monasticism flourished through saints like Anthony the Great and Pachomius, offering a new witness of prayer, asceticism, and communal life devoted to Christ.
035th–7th Centuries
Councils and Continuity
Ecumenical councils at Constantinople, Ephesus, and Chalcedon clarified Orthodox teaching about the Holy Trinity and the person of Christ against heresies of the time.
Missionaries brought the faith beyond the Empire into Ethiopia, Armenia, Georgia, and the lands of the Slavs, laying deep Christian roots in new cultures.
The Church's liturgical life, hymnography, and iconography matured, giving rise to the Liturgy of St. John Chrysostom and the poetic theology of St. Romanos the Melodist.
048th–9th Centuries
Triumph of Holy Icons
The Iconoclast controversy shook the Byzantine world as emperors attempted to remove icons from churches and outlaw their veneration.
St. John of Damascus, St. Theodore the Studite, and the holy confessors defended the theology of the incarnation that undergirds the use of icons in worship.
The Seventh Ecumenical Council (787) affirmed the rightful veneration of icons, and the Triumph of Orthodoxy in 843 restored sacred images permanently to the life of the Church.
0510th–15th Centuries
Orthodoxy in the Christian Commonwealth
The baptism of Prince Vladimir of Kiev in 988 brought the faith to the Slavic peoples, giving rise to a vibrant network of Orthodox cultures in the East.
Saints such as Sergius of Radonezh, Symeon the New Theologian, and Gregory Palamas renewed hesychast spirituality and articulated the experience of God's uncreated energies.
The fall of Constantinople to the Ottoman Turks in 1453 introduced new hardships, yet monasteries, parish communities, and lay brotherhoods preserved Orthodox worship and teaching.
0616th–19th Centuries
Witness through Mission and Martyrdom
Orthodox missionaries traveled to the far north of Russia, to Siberia, and across the Bering Sea, culminating in the mission to Alaska led by St. Herman, St. Innocent, and their companions.
The Church endured foreign domination and theological polemics, yet continued to teach the faith through catechisms, spiritual classics, and the steadfast witness of new martyrs.
Modern theological voices — including St. Nikodemos of the Holy Mountain and St. Paisios Velichkovsky — revived patristic spirituality, the Jesus Prayer, and the Philokalia for a new generation.
0720th–21st Centuries
Orthodoxy Across the Globe
The 20th century produced countless martyrs under communist regimes, while also sparking a renaissance of theological reflection through figures like St. Maria of Paris, Fr. Georges Florovsky, and Fr. Dumitru Stăniloae.
Immigration carried Orthodoxy to Western Europe, the Americas, Australia, and Africa, leading to the establishment of parishes, monasteries, and seminaries in new lands.
Today the Orthodox Church continues to proclaim the ancient faith in contemporary contexts, inviting seekers into the sacramental life and the communion of the saints.
