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.
Crispus of Chalcedon
Saint Crispus of Chalcedon was a bishop of Chalcedon. He is mentioned in First Corinthians 1:14. He was a ruler of the Jewish Synagogue at Corinth, He and his household were converted to Christianity by Paul of Tarsus (Acts 18:8). He was baptized by Paul in Corinth, Greece. He later served as Bishop of Chalcedon. He was martyred for his faith.