This marble slab bears an inception be the Pater Proficentius to whom Mithras has suggested to build and devote a temple.
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 munera...
It is here a happy, pure and pious, beneficent place that Mithras indicated to Proficentius, Father of the rites (pater sacrorum), so that he could build a crypt (spelaeum) and dedicate it to him. And it is with celerity, without respite, that he accomplishes these precious missions undertaken under good auspices, so that the syndexi can, with joy, celebrate their vows, eternally.
These little verses were composed by Proficentius, a very worthy father of Mithras.