The parapet is carried on very bold corbels of four and five courses in height, with pointed arches between them. The corbels at the angles being set diagonally, have a rather greater projection than those at right angles to the wall, and have therefore an additional course in the height. The arches adjoining the angles would naturally be wider than those on the faces, but to obviate this the corbels next the angle ones are slightly inclined towards them, so as to equalise the width of the openings. This is the general rule in all square towers of this description.
The gates of the town are simple arched passages passing through square towers, being a type of gateway of frequent occurrence in the South. They are not protected with flanking towers or angle turrets, such as are invariably employed for greater security in the North. The gate-towers were defended with châtelets on the outer side of the fosse. Of these, the “Porte St Lazare” on the north-east side of the town is the best preserved. This had a forework attached to the gateway which protected the drawbridge. The latter descended on a landing which formed a detached square barbican, fortified with a parapet and angle turrets, and surrounded with a ditch. From this outwork another drawbridge in one of the sides, and therefore at right angles to the main gateway, gave access to the exterior roadway. This gateway was destroyed by an inundation of the Durance in 1358, and was reconstructed in 1364 by Pierre Obreri, the architect of the Papal Palace.
The gateways of Provence, such as those of Orange and Marseilles, were usually similar in design to those of Avignon. At Carpentras and Aigues Mortes examples still exist of gateways pierced in square towers without flanking towers or turrets.
Pont St Bénezet.—The two opposite banks of the Rhone were generally in ancient times in the hands of different superiors. Thus, in the fourteenth century, while the Comtat Venaissin on the east belonged to the Popes, the opposite side of the river formed part of the kingdom of France. In order to protect the different domains castles were erected at both ends of the bridge which connected them.
FIG. 51. PONT ST BÉNEZET AND CHAPEL OF ST NICHOLAS, AVIGNON.
The bridge of St Bénezet ([Fig. 51]), which united Provence with the west side of the Rhone opposite Avignon, is said to have been built by Petit Benôit, a shepherd of the Vivarais, who believed himself inspired with a mission to carry out this great project. Benôit became the chief of a society of “hospitaliers,” instituted in the twelfth century for the purpose of building bridges, establishing ferries, and assisting travellers. He had already constructed a bridge at Maupas, when in 1178 he instigated the great undertaking of bridging the Rhone opposite Avignon. This he began in 1178 and finished in 1188. The bridge was almost 1000 yards long, and the roadway is about 16 feet wide including the parapets. Like the Pont St Esprit it forms an obtuse angle against the stream, and the centre rests on a flat island in the middle of the river. There were 18 arches in all, including those on the island. The piers are of a long low form, and their sharp beaks project a considerable way up and down the river beyond the bridge, giving the whole, as seen from the heights of the Rocher des Doms, very much the appearance of a bridge of boats. The alternate piers seem to have had recesses for allowing vehicles to pass, and all had archways above the level of the beaks to allow the passage of the flood waters of the Rhone which are sometimes excessive. The arches are slightly elliptical, or egg-shaped, which renders them stronger at the apex than the semicircle would be. They are constructed with four rings of arch stones in the width of the bridge, formed with carefully cut voussoirs—each ring being separate from, but placed close alongside of, the others. This idea was probably derived from the system adopted in the Roman Pont du Gard (as above explained), which is not far distant.
The bridge was cut for defensive purposes in 1395, during the siege of Avignon. It was probably thereafter imperfectly repaired, and in 1602 three of the arches fell; in 1633 two other arches gave way, and in 1670 two more. It is now reduced to the three arches adjoining the châtelet on the side next the town.
On the pier nearest the land still stands a picturesque chapel dedicated to St Nicholas ([Fig. 51]). The floor of this chapel being on the level of the top of the pier was considerably below that of the roadway of the bridge; but the building was so contrived that passengers on the bridge could see down through an arcade into the interior. Access to the chapel was provided by steps corbelled out on one side of the bridge. At a later period the structure has been raised and modernised.