Chalcedon
The site of Chalcedon is located on a small peninsula on the north coast of the Sea of Marmara, near the mouth of the Bosphorus. A stream, called the Chalcis or Chalcedon in antiquity and now known as the Kurbağalıdere (Turkish: "stream with frogs"), flows into Fenerbahçe bay. There Greek colonists from Megara in Attica founded the settlement of Chalcedon in 685 BC, some seventeen years before Byzantium.
Chalcedon
After the council, Chalcedon became a metropolitan see, but without suffragans. There is a list of its bishops in Le Quien, completed by Anthimus Alexoudes, revised for the early period by Pargoire. Among others are:The Greek Orthodox Metropolitan of Chalcedon holds senior rank (currently third position) within the Greek Orthodox patriarchal synod of Constantinople. The incumbent is Metropolitan Athanasios Papas. The cathedral is that of St. Euphemia.