The Roman triumphal arch at the edge of Cavaillon's old town is a modest but genuine first-century monument, one of several Roman remains scattered through the Luberon plain. It stands about eight metres tall, largely intact except for the upper decorative work, and carries carved reliefs of garlands and military trophies that are still legible despite two millennia of weathering.
The arch marks the boundary between the Roman city and what was then outside it — a boundary that the medieval town kept in use. Today it stands in a small square that feels slightly accidental, the arch preserved more by inertia than by design, which gives it an authenticity that a more tenderly curated monument might lack.