This building was actually a bath-gymnasium complex, erected in about the 2C AD.
It lay immediately north of the Magnesian Gate. There was a lecture hall (palaestra) at the entrance. During the excavations, the statues of healing god Asclepius, Aphrodite, Dionysus, Hygeia, Pan were found enriching here. They are in Izmir Archaeology Museum today.
There were enormous bathing halls in the centre of the structure, surrounded on three sides by vaulted halls for physical exercise, games and for strolling after the bath.