Sensible that I could not, without the assistance of plates, give a proper description of this triumphal arch, and the various subjects represented on it, I beg leave to refer the curious reader to Pietro Santo Bartoli's engravings, published by Bellori.* But those who examine, on the arch itself, the basrelieves executed in the time of Constantine, will readily perceive that the ingenious Bartoli has improved them in his prints.

* Veteres Arcus Augustorum, &c. tab. 23. ad tab. 47, inclusive.