One of the most important ancient cities of the Roman period, the ancient city of Aizanoi is located within the borders of Çavdarhisar district of Kütahya. It is thought that the city of Aizanoi was formed from the merger of the legendary king Arkas, Erato the nymph, and the mythological hero named Azan who is mentioned in the ancient sources. Excavations around the Temple of Zeus, located at the highest point of the ancient city of Aizanoi and home to many civilizations, showed that the first settlement began in the 3rd millennium BC.
The city, which came under Roman rule in 133 BC, was strengthened economically by grain cultivation, wine and wool production in the same period and the first coins were minted in the same period. There is a temple of Zeus, Theater and Aizanoi Macellum which is known as one of the first stock exchanges in the world. The inscriptions indicating the prices of the products sold during the period have survived to the present day. The ancient city, which was thought to have been home to approximately 80 thousand people in the Roman period, has a stadium for 13,500 people and a theatre for 20 thousand people.
One of the most striking structures in the ancient city is the Temple of Zeus, a large part of which has survived to the present day. The temple, which was built on the hill, is surrounded by columns and covered with marble beams and is shown as the unique example of its kind.
The ancient city of Aizanoi is open to visitors from 08:45 to 19:00 in summer and from 8:45 to 17:30 in winter and the museum cardholders can visit for free.