Criterion (iii): From the Augustan Age, the ancient Theatre of Orange is an exceptional example in the typology of Roman theatres. The theatre, like these vestiges, and like the triumphal arch, are no longer in their original state. The triumphal arch was restored in 1824, one of the oldest interventions of this kind in France. All work on historic monuments is subject to authorisation from the regional prefect after advice from the regional curator of historic monuments. The strengthening of consultation between the city of Orange and the State is an indispensable element in the long-term management of the Ancient Theatre and its surroundings and the “Triumphal Arch” of Orange.