This altar has been unusually dedicated to both gods Mithras and Mars at Mogontiacum, present-day Mainz.
TNMM513
D(eo) I(nvicto) M(ithrae) / et Marti / Secundini/us Amantius / cornicu(larius) / praef(ecti) leg(ionis) / XXII permi/ttente Pri/mulo patre / ex voto pos/uit l(ibens) l(aetus) m(erito).