Apollonia is located about 7 km north of Denizli's Tavas Town on a flat plain in Medet Village. The city is situated on a fruitful section of the Tavas Plain that has connections to Caria on the west via Tabea Road, to Likia on the south via Sebastopolis Road, and to Phrygia on the east via Tavas Road.

There is no accurate documentation regarding the founding of the city. But according to the ruins and antiques which were found in excavations in Apollonia, it is believed that the city was continuously inhabited from the Bronze Age onward. The city's name comes from the Hellenistic Era. Its golden years were during the Roman Period. Apollon Temple, which was founded in the Hadrianus Era, and its inscriptions have survived to modern times. The city minted coins between the 1st century B.C. and the 1st century A.D. with motifs of deities on them.