Located 57 kilometers (35 miles) from the Kütahya city center, the ancient site "experienced its golden age in the second and third centuries AD and became the center of the episcopacy in the Byzantine era," according to the website of the Turkish Culture and Tourism Ministry.
The project architect, Yalın Pekvar, pointed out that natural disasters like earthquakes and landslides had damaged the ancient theater and stadium.
Recent excavations around the Temple of Zeus indicate the existence of several levels of settlement in the city dating from as far back as 3000 BC. In 133 BC it was captured by the Roman Empire.
Between 1970 and 2011 German Archeology Institute conducted excavation work, unearthing the theater and a stadium, as well as two public baths, a gymnasium, five bridges, a trading building, necropolises and the sacred cave of Metre Steune -- a cultist site thought to be used prior to the first century BC.