This marble slab bears an inception be the Pater Proficentius to whom Mithras has suggested to build and devote a temple.
TNMM437 – CIMRM 423
Hic locus est felix sanctus piusque benignus / quem monuit Mithras mentemque dedit / Proficentio patri sacrorum / utque sibi spelaeum faceret dedicaretque / et celeri instansque operi reddit muneram /…