A few miles lower down the very interesting ruins of the MONASTERY OF CRUAS are seen on the same side of the river. This may be conveniently reached by the railway on that side, or from Montélimar. The latter course forms a beautiful drive, without taking the traveller going south far from his direct line. Crossing the Rhone by the bridge of boats not far from the station, the ruins of what once was the powerful castle of Rochemaur meet the view, crowning the rocky height in front, and extending great walls of enceinte down to the village at the base. The detached tower forming the keep, which could only be approached by a draw-bridge, now stands a shattered ruin on its isolated peak. [Illustration: FIG. 42. CASTLE OF CRUSSOL.] A drive of a few miles along a level road, above which on the left rise great masses of basaltic rock forming fantastic figures not unlike the ruins we have just passed, brings us to the village of CRUAS, where we discover two architectural subjects of some importance. On the hill above the village stand the ruins of the ancient monastery, now greatly dilapidated, and having the space between the walls choked up with the steep and irregular streets of a small town. The monastic buildings have almost entirely disappeared, the materials having doubtless served for the construction of the shabby houses which now occupy their place. Some portions of the enclosing walls, however, still survive, together with one very interesting edifice, which remains [Illustration: FIG. 43. ABBEY OF CRUAS FROM S.-W.] [Illustration: FIG. 44. MONASTERY CHURCH, CRUAS.] tolerably entire. This is the ancient chapel of the abbey, originally a building of the twelfth century, but which in the fourteenth century was engulphed by the enclosing walls and fortifications then erected, and heightened so as to be converted into a keep (Fig. 43). The interior has, however, been preserved untouched, and shews the simple style of the Cistertians of the twelfth century (Fig. 44). The plan consists of a single nave with plain pilasters set against the side walls, from which spring the flat transverse arches which strengthen the _round_ tunnel vault. The east end is terminated with a semi-circular apse roofed with a spherical dome, and ornamented with the small arcaded pattern so common at that period. On the left or northern side wall arches are introduced, as if for a side aisle, but there is no appearance of any aisles ever having existed. The plain round arched west doorway still exists, and the line of the original gable above it is distinctly observable in the masonry (_see_ Fig. 43).