Monumentum Mithras head of Walbrook The Mithras's head of Walbrook probable belonged to a life-size scene of the god scarifying the bull. Mithraeum.eu14 Jun 2009Updated 15 Aug 2021 Mithras head of LondonMuseum of London The full article is reserved for our members. Log in or create a free account to access the entire site. Marble head of Mithras in Phrygian cap. The head probably formed part of a life-size bull-slaying scene that stood in the temple. Mithras's eyes are turned away from the actual deed of slaying the bull.