Serapeum

The Serapeum of Saqqara was the ancient Egyptian burial place for sacred bulls of the Apis cult at Memphis. It was believed that the bulls were incarnations of the god Ptah, which would become immortal after death as Osiris-Apis, a name which evolved to Serapis (Σέραπις) in the Hellenistic period, and Userhapi (ⲟⲩⲥⲉⲣϩⲁⲡⲓ) in Coptic. It is one of the animal catacombs in the Saqqara necropolis, which also contains the burial vaults of the mother cows of the Apis, the Iseum. Over a timespan of approximately 1400 years, from the New Kingdom of Egypt to the end of the Ptolemaic Period, at least sixty Apis are attested to have been interred at the Serapeum.

This description is the opening of the Wikipedia article Serapeum of Saqqara, by its contributors, reused here under CC BY-SA 4.0 — which means you may reuse it from here on the same terms.