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.
Treaties between Amyntas III and the Chalcidians
One column containing two treaties between Amyntas III of Macedon and the Chalkidian League has been discovered at Olynthus (the capital of the League). The first treaty is dated in c. 393 BC, the second one before 382 BC. The language of the texts is Ionic Greek, the main dialect of Chalcidice.