The two reservoirs, as may be seen by the brickwork of which they consist, were added after Sylla’s time. They served to collect and keep the water which flowed from the fountains of the upper terraces, and to distribute it to those parts of the city which lay below the temple. The western reservoir, which can still be seen, is one of the most remarkable of such edifices now extant. It is 320 feet in length and 100 in width, and is divided internally into ten compartments, in the same manner as the Sette Sale at Rome, each communicating with the next to it by three apertures, and each lighted by two openings in the roof covered with circular well-mouths of stone. The interior walls of this reservoir are covered with the finest cement. On the exterior to the south, the walls are decorated with niches, one of which, with a square head, was intended to contain the inscription stating the names and titles of the builder of the reservoir.[149] The brickwork, which is similar to that of the Prætorian camp at Rome, and the fact that an inscription dated A.D. 18, when Tiberius was consul-designate for the third time, has been found near, seem to point to Tiberius as the builder. On the western side there are no niches, but a doorway, with a stair leading down to the bottom of the reservoir, and ornamented with two brick half-columns of the Doric order. [Sidenote: Terrace of cisterns.] From the area between the reservoirs just described, two staircases built by Sylla ascended to the level of the first principal terrace 1275 feet in breadth, containing two large basins for water, of rectangular shape, each 250 feet by 90 in size. They were intended for the purpose of the ceremonial ablutions commanded by the religious rites of the temple. That on the western side can still be seen in the Barberini garden, though it is now filled with rubbish. The rim or edging of these basins was of white mosaic. [Sidenote: Terrace of halls.]