The bath lies at the northwest corner of the city and the building did not receive much interest from researchers over the last 150 years. Most of them identified the building as an arched, colossal complex but none of them had anything to say about the function of the building. Seven section of the building have been unearthed by the excavations directed by Taşlıalan in recent years, but an important part of the complex, which is 70x55 m, is still buried and the plan is not yet clear. There is still some uncertainty whether the building is in fact a bath or not.
But until further excavations prove the contrary the building can be accepted as a bath house which it resembles.
Treating it as a bath, the building is a reasonable distance from the nympheum. The exterior of the walls of the building on the north side are similar to the semi-circular fortifications of the western city walls. So it is possible that the massive external walls of the structure were also used for fortification in an as yet unrecognized plan and the small entrance in the north wall was used for the supply of wood needed for heating. The stonemasonship of the building is the strongest work visible at Antioch and it looks as if it will keep the building standing for many thousand years yet to come.