Gaius Caelius Ermero

Several inscriptions at Ostia mention a certain Caius Celius Ermero, always referred to as the antistes of that place. One, engraved on a small marble altar, was found in the mithraeum of the Pareti dipinte, in a large patrician house. Another with an identical dedication is engraved on a small marble altar still in situ in the mithraeum of the Palazzo Imperiale. Finally, in the same latter shrine, this man is also the dedicatee of two statues of Cautes and Cautopates.

As R. Marchesini has shown, the bases supporting the statues of Cautes and Cautopates are in fact altars that were replaced and transformed into bases on which the statues of the dadophores were placed (which already appear in relief on the main face of each altar/base). At the same time, the previous inscriptions (with the exception of the consular date of 162) were removed and the dedications of Ermeros were engraved. In all probability, the four altars were originally located in the mithraum of the Pareti dipinte. A damnatio memoriae having struck the unknown dedicatee of the two altars with dadophoric reliefs, Ermeros appropriated these monuments as local antiquities (Huius loci).

It was for this reason that he had the two small altars CIMRM 259 and CIMRM 269 placed in this same mithreum. When the so-called Palazzo Imperiale was built, the same Ermeros probably had three of the four monuments moved to the new place of worship. It is perhaps then that the altars were transformed into pedestals, surmounted by statues that curiously reproduce the reliefs.

—Bricault (2021) Les Cultes de Mithra dans l’Empire Romain