The still legible iconographic programme deals with military themes brought to light thanks to
On the plaster of the pillars flanking the side entrances are large rectangular paintings, two to the east and two to the west, which show traces of life-size figures. Among them are four narrower rectangular surfaces, in each of which a signum is painted, a military element carried by the centuriae in battle. The best preserved is the one located to the east, next to the right-hand fornix , and is distinguished by the presence of imagines, portraits inserted in a round frame, used for political or imperial propaganda.
The military theme is repeated on the frescoes that decorate the eastern wall of the square, animated by the residual colours of a procession of trotting knights, heading towards the figures at the entrance.