Located between Apt and Bonnieux, the bridge Julien is a Roman building. Aged more than 2000 years, he is one of the most ancient monuments preserved in Provence. The building, consisting of three arches and spanning the Calavon, measuring 80 m long by 6 meters wide and 11 meters high.
On a road as important as the way domitienne, structures - bridges, long bridges, fords - were much more than previously thought: in fact, each crossing rivers was arranged in a manner for facilitate the transition.
The bridges could be made of stone - in large agencement under the High Empire (as the bridge Julien) or a small agencement at Century II (The bridge of Ganagobie) - but also of wood in the mountains in particular, confirms what the geographer Strabon at the Augustus period. Many have been destroyed over the centuries by floods. The smaller streams were overcome by building fords.