Costituiva l’ingresso monumentale del foro verso est. Liberato dalle strutture medievali nel bombardamento del 1943, in origine era caratterizzato da quattro grandi arcate disposte su pianta quadrata e soprastanti la Via Appia, il cui basolato è tuttora visibile. Sul lato ovest del foro si trovava un arco simile, poi sostituito dal medievale Palazzo Vinditti.

It was the monumental entrance to the Forum from the East side. The medieval structures,which had been built all around it, fell down during the bombing of the town in 1943 and so the arch came out in its original form. Originally it had four large archways layingon a square base overhanging the Via Appia whose paving blocks on still visible. A similar arch was situated on the west side of the Forum; later the medieval Palazzo Vinditti look its place.