The numerous fragments of pottery and mosaics which are constantly dug up, and a large quantity of portions of columns and architraves built into the modern walls, shew that the Roman works here were at one time considerable. [Illustration: FIG. 136. THE “PANTHEON,” RIEZ (_From Texier and Pullan_).] In the chapel of St Maxime six Roman columns have been utilized. But the most remarkable monument of the place is the so-called “Temple” or “Pantheon.” This consists externally of a plain square structure, 37 feet each way, but internally it is octagonal in plan (Fig. 135), with four deep niches in the sides opposite the angles of the square. Within the octagon are eight columns standing detached, so as to form an aisle all round, while they support an octagonal drum (Fig. 136), roofed over with a dome. The aisle is vaulted, with an irregular form, composed of about three-fourths of a pointed arch. The columns are ancient, but they have evidently been removed from their original position, being unequal in the length of the shafts, and the size and design of the capitals, and have no doubt been collected from various sources. Texier [Illustration: FIG. 137. FRÉJUS CATHEDRAL, CLOISTERS.] and Pullan believe that this was an ancient Roman structure converted to Christian uses in the sixth century; but excavations in the floor have revealed the remains of a large baptismal basin, similar to the original Italian ones, thus leaving no doubt as to the primitive destination of the structure. The pointed arch over the aisle is also a sign of its belonging to post-Roman times. It is certainly one of the most interesting of the early Christian edifices in Provence.