Situated on a Roman archaeological site, the museum traces the region's Roman heritage with mosaics, mural paintings and various objects.

The region of Vallon and La Broye was marked during Antiquity by the prestige of Aventicum (modern-day Avenches), the capital of Roman Switzerland (from the first to third centuries AD). Six kilometres away from the ancient city, the museum is located on the very site of the Gallo-Roman villa in Vallon. It presents the everyday life of the residence during the first four centuries of our age.

The two famous mosaics "Bacchus and Ariane" and "Venatio", discovered in 1985, are the most impressive attractions of the exhibition.