Immediately to the south of the civil basilica and the decumanus alongside it, remains have been discovered of a major set of ramparts built with a series of triangular bastions in a characteristic jagged-line formation. This new defensive line, which could be reached in the west from a rural track, effectively led to the abandonment of the entire northern part of the Roman city, starting from the forum. Instead, it defended the settlement that had developed around the basilica complex. To the east, the walls linked up with the earlier late-imperial walls, while a gateway stood where they met Roman Aquileia’s main north-south street artery. This new set of walls, with the straight-line rampart that preceded it and that runs partly over the ruins of the civil basilica, has recently been dated to the 6th century, after the Greek-Gothic War (ad 535–553) and the Byzantine reconquest.