Çavdarhisar is a town and district of Kütahya Province in the Aegean region of Turkey. According to 2000 census, population of the district is 13,538 of which 4,687 live in the town of Çavdarhisar. The local Kocaçay stream is still crossed by the Roman Penkalas Bridge.Places of interest Aizanoi ancient city of Phrygia