The inscription explains the transmission of the fourth Mithraic degree through the Paters of the Mitraeum of San Silvestro.
TNMM448 – CIMRM 400
Constantio VIllI et Iuliano II con[s(ulibus)] / Nonius Victor Olympius v(ir) c(larissimus) p(ater) p(atrum) / et Aur(elius) Victor Augentius v(ir) [c(larissimus)] pater / tradiderunt leontica IIII idu…