This building was erected in 2nd century AD situated right next to the harbor filled with sands and was undergone many repair works. The harbor baths were built to allow the sailors coming back on the land to clean and to rest in the ancient cities.
These baths heated from the ground and the walls. At the entrance is Apodyterium ( dressing room ). A passage hall provides entry from here to four rooms with wide domes and these domes placed side by side. It is possible to advance from each one of these rooms to another one. It is also possible to enter from the dressing room to a hall through a door and another door provides entry from this hall in to hot section ( Caldarium ), the widest hall of the building hosting marble pools. This hall opens other two successive large halls. These are first tepid section ( Tepiderium ) and cold section ( Frigidarium ).