Antiquarium di via del Seminario (Antiquarium in the Seminary Street), Trieste

The Antiquarium is located on Seminary Street, on the hill of San Giusto. This site preserves a portion of the ancient city walls, 8 feet wide and 13 feet high. The remains are of two outer faces of sandstone filled with stone rubble and lime. At the base of the wall is a small moat for water runoff.

From the middle of the first century BC and the first century AD the city walls lost their effectiveness as defenses. They came to be used as terraces and retaining walls, supported landscaping, and held the hillside in place. The walls are said to have been built by Octavian in 33 BC before he became Augustus Caesar.

Close to the wall is a room floored with opus spicatum ("herringbone work"). Bricks are arranged in a fishbone pattern. This style was frequently seen in old Roman constructions. Pieces of amphorae (large urns) were also found here. It is thought the room was used to process oil and to house an oil press.

The Antiquarium in Seminary Street is open to visitors on Saturdays from 10 am to 12 pm.