Christianity in Turkey
Constantinople became established in the ecclesiastical hierarchy at the Council of Constantinople in 381. Second only to Rome, the legendary origins of the Patriarchate of Constantinople go back to St. Andrew, Metrophanes and Alexander of Constantinople. Constantinople's primacy over the Patriarchates of Alexandria and Antioch was reaffirmed at the Council of Chalcedon in 481, after which the papacy in Rome supported Constantinople in its dispute with Alexandria over monophysitism. Later, when Rome sought to assert its primacy over Byzantium, the Eastern Orthodox church developed the doctrine of pentarchy as a response.
Egypt (Roman province)
The reign of Constantine also saw the founding of Constantinople as a new capital for the Roman Empire, and in the course of the 4th century the Empire was divided in two, with Egypt finding itself in the Eastern Empire with its capital at Constantinople. Latin, never well established in Egypt, would play a declining role with Greek continuing to be the dominant language of government and scholarship. During the 5th and 6th centuries the Eastern Roman Empire, today known as the Byzantine Empire, gradually transformed itself into a thoroughly Christian state whose culture differed significantly from its pagan past.