The altar in the middle was erected by Adlectus, slave of Tiberius, who wanted to pay
tribute to Mithras, unconquered god and creator of light (genitor luminis).
The Latin text (CIL 03 - 04414):
Deo Invicto Mithrae
ADLECtus
SERvus Titi C ? V ?
GENitori LUMinis
Votum Solvit Libens Laetus Merito