The triumphal arch supported an equestrian statue of bronze, thought to be that of Tiberius, or Caligula, the fragments of which were found below.
The fountains probably existed, because the remains of water-pipes are still found in the masonry of the arch, though it is not easy to ascertain the exact manner in which they were employed, but it is to be remarked that the arch fronting this at the entrante of the Forum had also its fountain or reservoir of water.
The actual appearance of this spot having been first drawn with the camera lucida, the objects have been restored upon that drawing, in order to render intelligible its ancient aspect to those who are in need of such assistance, without the possibility of erring widely from the truth.
Above the arch is placed the inscription «Augusto Caesari parenti patriae», which was on marble, and which, Iorio says, was positively found near the spot.
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