 During the time when the city especially flourished between the 6th and 4th centuries BC, a large temple of Amun-Gereb, the supreme god of the Egyptians at the time, was located in the middle of the city.Pharaoh Nectanebo I made many additions to the temple in the 4th century B.C.Sanctuaries in Heracleion dedicated to Osiris and other gods were famous for miraculous healing and attracted pilgrims from a wide area.