Chalcedon
Chalcedon ( or ;
, sometimes transliterated as "Chalkedon") was an ancient maritime town of Bithynia, in Asia Minor. It was located almost directly opposite Byzantium, south of Scutari (modern Üsküdar) and it is now a district of the city of Istanbul named Kadıköy. The name "Chalcedon" is a variant of Calchedon, found on all the coins of the town as well as in manuscripts of Herodotus's "Histories", Xenophon's "Hellenica", Arrian's "Anabasis", and other works. Except for a tower, almost no above-ground vestiges of the ancient city survive in Kadıköy today; artifacts uncovered at Altıyol and other excavation sites are on display at the Istanbul Archaeological Museum.
Council of Chalcedon
The Council of Chalcedon () was a church council held from 8 October to 1 November, 451, at Chalcedon. The council is numbered as the fourth ecumenical council by the Catholic Church, the Eastern Orthodox Church, and most Protestants. Oriental Orthodox Churches do not agree with the conduct and the proceedings of the Council, commonly calling it "Chalcedon, the Ominous". Several Oriental Orthodox Church historians have viewed the Council as a power dispute by the Church of Rome of having special patriarchal status among other Churches. The Oriental Orthodox Churches have seen this as the key factor contributing to the Great Schism.