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.
Byzantine art
Two events were of fundamental importance to the development of a unique, Byzantine art. First, the Edict of Milan, issued by the emperors Constantine I and Licinius in 313, allowed for public Christian worship, and led to the development of a monumental, Christian art. Second, the dedication of Constantinople in 330 created a great new artistic centre for the eastern half of the Empire, and a specifically Christian one. Other artistic traditions flourished in rival cities such as Alexandria, Antioch, and Rome, but it was not until all of these cities had fallen - the first two to the Arabs and Rome to the Goths - that Constantinople established its supremacy.