The Roman Theatre is a similar age to the amphitheatre and seated about 10,000 spectators in 35 rows of semi-circular seats. With the fall of the Roman Empire, the stone was robbed out for use as building material and it was left abandoned until finally being cleared in the C19th. It is again being used for performances in the summer months.
The facade facing Jardin d’Eté is is three stories high and from a distance looks a bit like a church tower. Scattered round the outside are the remains of Roman masonry which seem to have been dumped here.
Inside the seats rise up in a semi-circular tier around the central stage. Only the column bases are left of this.
There is a charge to go into the theatre itself, but there are good views from the outside, so I didn’t bother! It isn’t as impressive as the amphitheatre.