Victorinus (96) was a home-born slave of the Imperial family (verna Caesaris nostri) and was employed as dispensator, that is an intermediate clerical grade identifying the head of often more than one department within the household.
The sanctuary to which this inscription belongs has not been found. However, it is possible that the Mithraic group of Tivoli, possibly connected to the imperial estate of Villa Adriana – since Victorinus is an imperial steward – may have originated in part from the capital.
—Bricault; Roy (2021)
This tabula marmorea was consecrated by a certain slave Vitorinus in Tibur, nowadays Tivoli, near Rome.