Let us now refer to the account given by Procopius[344], who, after stating that the Emperor Justinian had ordered a Temple, dedicated to the Virgin, to be built at Jerusalem on the most prominent of the hills, goes on to say, "The hills however had not sufficient space for the completion of the work according to the Emperor's order; but a fourth part of the Temple was deficient, towards the south and the east, just where it is lawful for the priests to perform their rites. Hence the following device was conceived by the persons who had charge of the work--they laid the foundations at the extreme of the flat ground and raised a building of equal height with the rock. When, then, they had brought it as high as the extremity, they placed over the intervening space arches from the top of the walls, and connected the building with the remainder of the Temple's foundation. In this way the Temple is in part founded on solid rock and in part suspended; the Emperor's power having contrived a space in addition to the hill." He also states that this is the only building in the city situated in this way. I agree with what the historian says of the want of space, on the south and east (where the ruined vault was), and that the persons in charge of the work built the side walls as described, but do not believe that they were the first persons to construct them; they found them existing, but in ruins, and made use of the excellent materials which were lying on the spot, to rebuild them to suit their purpose; repairing such parts as they found standing upright and firm. As I agree in almost every point with the opinion of M. de Vogüé, I quote his words[345]: "This gallery is a Byzantine building, and is roofed with two parallel barrel vaults, the inner sides of which are supported by a row of semicircular arches springing from square piers. The south end is covered by four domes arranged in a square, resting on pendentives; and the four arches dividing and supporting them spring from an isolated central column. This arrangement is characteristic, so that though the end of the building is ancient, and probably of the age of Herod, it is impossible to assign that date to a vestibule vaulted with domes. This portion of the passage has then been rebuilt at a comparatively modern period, namely that of the foundation of the basilica."