Symmachi–Nicomachi diptych
The Symmachi–Nicomachi diptych is a book-size Late Antique ivory diptych dating to the late fourth or early fifth century, whose panels depict scenes of ritual pagan religious practices. Both its style and its content reflect a short-lived revival of traditional Roman religion and Classicism at a time when the Roman world was turning towards Christianity and rejecting the Classical tradition.
Source: Wikipedia — Symmachi–Nicomachi diptych (CC BY-SA 4.0)