- Χρῆστος was a Pater.
Based on the inscription of the relief of Mithras killing the bull, on display in the Vatican Musei, where his name appears, Χρῆστος was previously thought to be an artist, as first described by Brunn Künstlergesch.
However, I saw, ἐποίησαν only the consecration, since πατήρ is a priestly title in the Mithraic cult. Kaibel IGI 1272. Loewy Inscription Greek image 457.
—Carl Robert. Paulys Realencyclopädie der classischen Altertumswissenschaft
This relief of Mithras killing the bull, signed by a certain Χρῆστος, is on display in the Sala dei Animali of the Vatican Museum.