The keep built round and over the church is of remarkable design. Large round buttresses have been added at the outer angles, with square buttresses at the sides, and both are carried up so as to receive the arches which support the parapet on the top. These arches spring from bold corbels projecting from the buttresses, and are set well forward from the face of the walls, so as to leave a space between the main wall and the parapet. This space forms a long opening or machicolation, by means of which the base of the walls could be defended against hostile operations. We shall see by and by that this is the same form of machicolation as was adopted in the Pope’s Palace at Avignon, and elsewhere in the South. The parapet is crenellated, and, from the beam holes still visible in the walls, we may infer that it was provided with wooden hoardings for defence. The church in the village at the base of the hill (Fig. 45) has also some points of special interest. It is of early twelfth century design, and has a vaulted subterranean crypt with numerous sculptured caps. The upper church has a square tower at the west end, and a transept with three circular apses opening out of it to the east,--the central apse forming the choir, and the side apses lateral chapels. Over the crossing rises an octagonal lantern, containing a dome crowned with a smaller circular lantern. The [Illustration: FIG. 45. CHURCH AT CRUAS.] whole composition and style of ornamentation strongly recall the architecture of the Rhineland and Lombardy. The thin strips of pilasters on the apses and lantern, with small arcade-enrichment between, together with the general form of the lantern, strikingly recall the churches of Bonn and Cologne. The western tower again is similar to those we have left behind at Vienne and Lyons. This church, like many others we shall encounter, illustrates what has above been stated as to the universality of the one style which prevailed over the “Empire,” before it was broken up into separate nationalities. Soon after leaving Montélimar with its frowning citadel, in which there are some ancient Romanesque details, and a great tower of the fourteenth century called the “Tour de Narbonne,” we observe on the opposite side of the Rhone the picturesque town of VIVIERS, clustering on a pyramidal rock, and appropriately crowned with the cathedral and spire. The church is of the fourteenth century, a single nave without aisles. It is said that the crowded and narrow streets contain some old houses, but the place is apparently more picturesque than architectural.