Troglodyte habitat, occupied mainly between the 11th or 12th century and the 14th century. The remains are located on top of a hill of the same name, at an altitude of 230 metres.
It is thought that the site was besieged in the 11th century, a controversial hypothesis based only on the testimony of papal bull.
All that remain today are a few strata of ramparts, the foundations of a seigniorial dwelling and the chevet of Saint Marie castle chapel on a huge terraced plateau. Its destruction seems due more to abandonment than to pillage, judging by the piles of stones strewn over the rocky promontory. Located opposite Les Baux fortress, a seigniorial fortress on which the Castrum de Mont Paon depended, the Castrum was an ideal point for keeping watch over the Les Baux marshlands, a highly desired fishing zone and the border with the nearby Kingdom of France.