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.
Great Palace of Constantinople
The Great Palace of Constantinople (, "Méga Palátion"; Latin: "Palatium Magnum", Turkish: "Büyük Saray"), also known as the Sacred Palace (, "Hieròn Palátion"; Latin: "Sacrum Palatium"), was the large Imperial Byzantine palace complex located in the south-eastern end of the peninsula now known as Old Istanbul (formerly Constantinople), in modern Turkey. It served as the main royal residence of the Eastern Roman or Byzantine emperors from 330 to 1081 and was the center of imperial administration for over 690 years. Only a few remnants and fragments of its foundations have survived into the present day.