The Roman Museum in Avenches presents the vestiges of Aventicum, the Roman capital of the Helvets. The scientific excavations, which were started in the 19th century, are pursued to this day.

The Roman Museum focuses entirely on Aventicum, the Roman capital of the Helvets. This town had 20,000 inhabitants, a number that has never been reached again. Aventicum was fortified with a wall measuring 5.5 km in length and containing 4 gates. 73 towers allowed access to its rampart walk.