Small covered amphitheatre dating back to the 2nd century AD. It has been built into an indentation in a rock. After some transformations, the stone block rows, of which 8 are preserved today, have been added at the end of the 2nd century. The two rows in front were seats of honour as they dispose of back and arm rests. These things are the unique prove of such places of honour in Gaul. Until the end of the 3rd century, the theatre served as venue and place of assembly. It had a capacity of 3500 persons.