"Serapis (Koinē Greek: Σέραπις, later form) or Sarapis (Σάραπις, earlier form, originally Demotic: wsjr-ḥp, Coptic: ⲟⲩⲥⲉⲣϩⲁⲡⲓ Userhapi "Osiris-Apis") is a Graeco-Egyptian deity. The cult of Serapis was introduced during the third century BC on the orders of Pharaoh Ptolemy I Soter of the Ptolemaic Kingdom as a means to unify the Greeks and Egyptians in his realm. A serapeum (Koinē Greek: Σεραπεῖον serapeion) was any temple or religious precinct devoted to Serapis. The cultus of Serapis was spread as a matter of deliberate policy by the Ptolemaic kings, who also built the immense Serapeum of Alexandria. Serapis continued to increase in popularity during the Roman Empire, often replacing Osiris as the consort of Isis in temples outside Egypt." - (en.wikipedia.org 30.01.2020)
