Pyramid of Djoser
The Serapeum of Saqqara is a serapeum located north west of the Pyramid of Djoser at Saqqara, a necropolis near Memphis in Lower Egypt. It was a burial place of Apis bulls, sacred bulls that were incarnations of the ancient Egyptian deity Ptah. It was believed that the bulls became immortal after death as "Osiris Apis", a name that appears in Coptic as , "Userhapi", which was borrowed in Greek as , "Serapis", in the Hellenistic period.