History of Eastern Orthodox theology

Eastern Orthodox Christian theology originated with the life of Jesus and the establishment the Christianity in the 1st century AD. Major events include the Chalcedonian schism of 451 with the Oriental Orthodox miaphysites, the Iconoclast controversy of the 8th and 9th centuries, the Photian schism (863-867), the Great Schism (culminating in 1054) between East and West, and the Hesychast controversy (c. 1337-1351).

Source: Wikipedia — History of Eastern Orthodox theology (CC BY-SA 4.0)