According to Franz Cumont, the imagery of the tauroctony was a Graeco-Roman representation of an event in Zoroastrian cosmogony described in a 9th-century AD Zoroastrian text, the Bundahishn. In this text the evil spirit Ahriman (not Mithras) slays the primordial creature Gavaevodata which is represented as a bovine.[191] Cumont held that a version of the myth must have existed in which Mithras, not Ahriman, killed the bovine. But according to Hinnells, no such variant of the myth is known, and that this is merely speculation: "In no known Iranian text [either Zoroastrian or otherwise] does Mithra slay a bull"[192]
David Ulansey finds astronomical evidence from the mithraeum itself.[193] He reminds us that the Platonic writer Porphyry wrote in the 3rd century AD that the cave-like temple Mithraea depicted "an image of the world"[194] and that Zoroaster consecrated a cave resembling the world fabricated by Mithras.[135] The ceiling of the Caesarea Maritima Mithraeum retains traces of blue paint, which may mean the ceiling was painted to depict the sky and the stars.
Parallel:
Gilgimesh
Minetaur
Moses