Jublains archeological site
The Jublains archeological site is a cluster of ruins, mostly dating back to Ancient Rome, in the current French commune of Jublains in the département of Mayenne in the Pays de la Loire. Roman imperial authorities built a city named Noviodunum on the site of a temple of the Celtic Diablintes, which became the capital of this people in the Augustan administrative reorganization.
Source: Wikipedia — Jublains archeological site (CC BY-SA 4.0)