Mnevis

Mnevis is the hellenized name of an ancient Egyptian bull god which had its centre of worship at Heliopolis, and was known by ancient Egyptians as Merwer ("great black") or Merur.

Although initially a separate god, it was later assimilated to the synchretized god Atum-Ra as his physical manifestation, and also considered as the ba of Ra. Merwer is often depicted as a black bull wearing a solar disk and uraeus. As reported by Plutarch, the Merwer bull was second only to the Memphite Apis bull in importance; similarly to the Apis bull, the Merwer' movements were driven by divine will, and used as an oracle. The priesthood of Merwer also came as far as claiming that Merwer was no other that the father of the more famous Apis.

The Merwer bull was entitled to two concubines, more precisely two cows representing Hathor and Iusaaset. When the bull died, it was embalmed and buried with all honors in a dedicated necropolis which was located not far from the temple at Heliopolis. Another burial ground was reserved for the so-called Mothers of Merwer, which were considered the embodiment of the cow-goddess Hesat. Then a replacement for the Mnevis was sought, usually a completely black bull. There weren't more than one Mnevis bull at a time.

The cult of Merwer was among the very few ones to be tolerated during the "Amarna heresy" of king Akhenaten, probably because of its solar attributes: it is known that this pharaoh ordered a necropolis for Mnevis bulls in Akhetaten, although it has not been found yet.