Orange has a theatre which, now that the upper tiers of seats have been restored, has very much its original appearance. The immense stone wall, forming the back of the semicircular stage, is 118 feet in height and 13 feet thick. Stone was close at hand, making its construction easy, and the auditorium was hewn out of the limestone hill against which the theatre was built. There appears to have been a permanent roof of timber--a unique feature--for there are structural indications leading to such a conclusion, as well as signs of fire, which no doubt was the cause of its disappearance. In about A.D. 21 a very fine triumphal arch was erected at Orange, then known as _Arausio_, and this still stands complete, save for the detrition on its surface caused by the weather and perhaps some rough handling in the Dark Ages. Very judicious restoration has given one a convincing idea of what is missing where the structure has not been overlaid with new work. St. Remy has contrived to preserve a considerable portion of its triumphal arch, and close to it a remarkably perfect mausoleum, 50 feet in height. It is adorned with much sculpture like the archway, and both stand upon an exposed rocky plateau. There are, indeed, so many survivals of this period which one would like to mention that there would be no space to deal with any later age. Vienne, on the extreme confines of Roman Provincia, has its temple, rebuilt in the second century, converted into a Christian church in the fifth, and made more famous during the Revolution by the celebrating within its walls of the Festival of Reason. Remains of the city walls, of a theatre, of the balustrade of a fine staircase, of a pantheon, an amphitheatre, and a citadel are still to be seen. The Roman aqueduct, which supplied the city, restored in 1822, is still to some extent in use! Perigueux is full of indications of its Roman buildings. The Tour de Vesone is in part a Gallo-Roman temple, dedicated to Vesuna; the remains of the amphitheatre include much of the outer wall, in which are staircases, vomitoria, and the lower vaulting now partially exposed. At Lillebonne, mentioned in another chapter, are the carefully excavated remains of a theatre; at Carcassonne, at Narbonne, at Lyons, in Paris, and in other cities and towns, Roman foundations and many sculptured stones are full of significance, and of absorbing interest to the historian, the architect, and the archaeologist.