Arco di Riccardo

Slightly incorporated into a less ancient building, the arch is a small but simple and solid construction (about seven metres by just over five), with pilasters on the pillars and a plant motif decoration under the archway. The common idea is that it was one of the gateways in the city walls, which were built in 33 BC under Augustus. At that time, however, the site of the nearby Cathedral of San Giusto must have long since been the original site of Trieste.

Also nearby, in Piazza della Cattedrale, the Tergestino Lapidary set up in a bastion of the Castello di San Giusto exhibits materials unearthed in the area and elsewhere in Trieste: altars, stelae, boundary stones, urns and sarcophagi. There are also remarkable mosaics found during excavations of a maritime villa in Bàrcola, dating from the end of the first century BC to the middle of the first century of the Common Era.