Definitions for "Serapeum"
Set of underground galleries at Sakkara serving as the burial place of the sacred Apis bulls from the Eighteenth Dynasty onwards. The term Serapeum strictly refers only to the Graeco-Roman temple at ground level, dedicated to the god Serapis.
This term was applied to two places. The first is at Saqqara; and it refers to the underground galleries which contained the burial chambers of the Apis bulls. The second place is at Alexandria where there has been a temple from Greco-Roman times dedicated to the cult of the god Serapis or the Apis Bull in those times.
The burial place of the Apis bulls at Sakkara.