Tauroctony

The tauroctony scene is the cult relief (i.e. the central icon) of the Mithraic Mysteries. It depicts Mithras killing a bull, hence the name 'tauroctony', given to the scene in modern times possibly after the Greek ταυροκτόνος (tauroktonos) "slaughtering bulls", which derives from ταῦρος (tauros) "bull" + κτόνος (ktonos) "murder", from κτείνω (kteinō), "I kill, slay".