The excavation of the area commenced in 1928 and is continued at present by the University of Thessaloniki. It has brought to light a fortified city, surrounded by cult areas, that was inhabitated continuously from the Classical period to Early Christian times. Buildings of various periods have been discovered in a series of different levels. Private residences, public buildings, shops, and a large number of workshops are erected in building blocks defined by the streets. On the south edge of the ancient city are the public baths (thermae), an imposing complex covering an area of over 4,000 square metres and dating from about A.D. 200. In the east sector has been discovered the villa of Dionysos, which takes its name from the large mosaic depicting the god that covers the floor of the banqueting room.