This Roman theatre is the place where the first Christian martyrs of Gaul were killed. Documents say that it was the largest theatre in Gaul at that time, but nobody knows exactly how far it extends under the neighbouring buildings, nor what remains from the Roman era after centuries of construction. After the closing of the old Fine Arts school (the grey building overlooking the theatre), a debate was initiated about what should be done with this exceptional archaeological site. The theatre can be seen from the street but is not open to the public for safety reasons.