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 Great Schism, the Latin Church retained Chalcedon as a titular see with archiepiscopal rank, with known incumbents since 1356. Among the titular bishops named to this see were William Bishop (1623–1624) and Richard Smith (1624–1632), who were appointed vicars apostolic for the pastoral care of Catholics in England at a time when that country had no Catholic diocesan bishops. Such appointments ceased after the Second Vatican Council, leaving the titular see vacant since 1967.