This Mithraic temple, also known as the Mithraeum of the Olympii, dates to the 3rd century and was rediscovered in 15th-century Rome, but it has not been preserved.
The Mithraeum in the Chapel of the Three Naves was not linked to the cult of Mithras until recently because of a mosaic showing a pig, in the belief that it was an animal unfit for consumption in a temple of Eastern origin.
Journée scientifique du 17 décembre 2021 au Musée royal de Mariemont, dans le cadre de l’exposition 'Le Mystère Mithra. Plongée au cœur d’un culte romain'.