The holy fountain (nymphaeum) was built during the Roman age (2nd century A.D.). The structure consisted of numerous statues of gods, goddesses and nympheas. There was a pool in front of the west facade. The building was three storey and 20 m. wide with plenty of amphoras where water was pouring into the pool on the front wall and also from the mouths of fishes on the side walls.
There are many statues from the nymphaeum on display in Pergamon museum in Berlin today. Also, Istanbul Archaelogy Museum keeps a number of statues and inscriptions of the holy fountain. .