It was founded in 190 BC by Eumenes II. The city came under the domination of Roman Empire in 2 BC and it was the golden era for the city; besides; after it was collapsed by earthquakes it became a typical Roman city with its architecture. As Saint Phillippus, one of the apostles of Jesus Christ, was murdered here, the city gained a religious prominence. It was Byzantium city in 395 AD and later on the city was within the boundaries of the Seljuks in 1210.
Underground waters of Pamukkale used for treatment have attracted tourists for years thanks to its travertine terraces.
Great Bath Complex was founded outside the city to allow the passengers to have a bath before they came into the city.
Since the capacity of the theater was 9.500 people, it is estimated that the population of the city was around 95.000-100.000.
From the design of the theatre, it seems that gladiators fought here. There is one meter elevation difference between the rows and the stage in order to protect the audience from fierce animals. This feature is not found in other theatres where gladiators did not fight, and rows start from the same level as the stage.
The figure of Medusa engraved on the entrance door of the city was made to protect the city from Goddess Medusa. It is though that such belief has found a place in Turkish culture as amulets. The city is included in World Heritage List by UNESCO.