Pyramid of Djoser
The Serapeum of Saqqara is located north west of the Pyramid of Djoser at Saqqara, a necropolis near Memphis in Lower Egypt. It was a burial place of the Apis bulls, sacred bulls that were incarnations of Ptah. It was believed that the bulls became immortal after death as Osiris-Apis, a name shortened to Serapis in the Hellenic period.