Roman Bath. This building, which is located at the northwest corner of the city, drawsattention with its large blocks and intact structure. The building, of which seven spaces have been excavated, measures 80 x 55. It is controversial whether is is a bath or not. Considering the sun and wind factors, the entrances and hearths of all baths are in the south and east directions; however, the situation is different. There are not many traces of water supply and heating systems [either – D.O.]. As in the Pergamon Trajan Temple, the building reveals itself as a structure carrying a large building with its vaults on a plain area obtained from the slope of the land. The building is dated to the 1st century AD.
I understand the message here is: this is not a Roman Bath, but a substructure of a building that either disappeared or never was actually built.