erected, A.D. 205, in honour of the emperor and his two sons,
Caracalla and Geta, by the senate and people of Rome.[4] The
sculptures adorning it are interesting, and represent his victories
over the Parthians, Arabians, and Adiabenes.
A chariot, containing the statues of the emperor and his sons, drawn
by six horses (now in S. Mark's, Venice), stood on the summit. The
sculptures represent details of the Roman military harangues, sieges,
camps, assaults with battering-rams, and the submission of prisoners.
The front towards the Forum represents the emperor addressing his
troops, the taking of Carrha, the siege of Nisibis. The front facing
the Capitol represents another harangue, the siege of Atra, and the
passage of the Euphrates and Tigris.
_In front of the arch are the bases of_