The remains of the bathhouse show that it had various sections meant for different purposes, like undressing, bathing, sweating, resting and eating.
"These required separate rooms with specific facilities, which the Romans had built painstakingly to accommodate different purposes," said the archeologist.
Archaeologists said the area added to the UNESCO World Heritage Tentative List in 2012, has revealed settlements, dating back to 3000 B.C.
Located some 57 kilometers (35.4 miles) away from Kütayha's center, the city of Aizanoi had attained place of a religious center under the Roman Empire in 133 B.C. But, it lost importance during the early Byzantine period.
The flat area around the Temple of Zeus was transformed into a fortress in the medieval period and was used as a base by the Çavdar Tatars in the 13th century. It was discovered by European travelers in 1824.