The nymphaeum, the sacred place devoted to the nymphs, the daughters of Poseidon, sheltered a great cluster of constructions related to the irrigation of the city. Three big units, a rectangular arched chamber for meetings, the small atrium and the cluster of cisterns with the fountains, constituted the nucleus of this huge building, which besides all the above, comprised also two big cluster of baths. It was constructed in the 1^st century A.D. and was destroyed in the 7^th century in the period of the Arab raids.