The donor of this Mithraic inscription from Bolsena, a certain Tiberius Claudius Thermoron, is known from two other monuments.
TNMM652 – CIMRM 660
Soli invicto / Mitrhae(sic!) / Tiberius Claudi/us Tiberi filius / Thermodon / spelaeum cum / signis et ara / ceterisque / voti compos / dedit.