Monumentum Petrogeny with hand on head from Nida This sculpture of Mithras being born from a rock is unique in the position of the hands. Petrogeny from FrankfurtArchäologisches Museum Frankfurt The New Mithraeum23 Dec 2023 The full article is reserved for our members. Log in or create a free account to access the entire site. A young [Mithras] emerging from a rock where he is up to his waist, placing his right hand on his head and holding an elongated object [torch?] in his left hand, which is resting on the rock. Part of the left arm has been restored, but not the hand.