The Mackwiller Mithraeum was built in the middle of the 2nd century, during the reign of Antoninus the Pious, on the site of a spring already worshipped by the natives.
C’est en 1986, à l’occasion de la restructuration de l’ancien magasin Parunis, qu’une fouille de sauvetage archéologique fut réalisée cours Victor Hugo.
The Mithraeum or Angers contained numerous objects, including coins, oil lamps and a ceramic vessel engraved with a votive inscription to the invincible god Mithras.
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.