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.
Constantinople
According to Pliny the Elder in his "Natural History", the first known name of a settlement on the site of Constantinople was "Lygos", a settlement likely of Thracian origin founded between the 13th and 11th centuries BC. The site, according to the founding myth of the city, was abandoned by the time Greek settlers from the city-state of Megara founded "Byzantium" (, "Byzántion") in around 657 BC, across from the town of Chalcedon on the Asiatic side of the Bosphorus.