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.
Chaldean Catholics
The current patriarch considers Baghdad as the principal city of his see. His title of "Patriarch of Babylon" results from the identification of Baghdad with ancient Babylon (however Baghdad is 55 miles north of the ancient city of Babylon and corresponds to northern Babylonia). However, the Chaldean patriarch resides habitually at Mosul in the north, and reserves for himself the direct administration of this diocese and that of Baghdad.