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.
Chiseldon
Settlements in the area date back to prehistoric and Roman times, but Chiseldon itself was started by the Saxons. The Domesday Book of 1086 recorded a large settlement of 70 households at "Chiseldene". At one point the nearby hamlet of Draycot Foliat was larger than Chiseldon. Chiseldon lies on one of the country's oldest highways, the Icknield Way, although this section of the road is more commonly known as The Ridgeway.