Built between the 12th and 13th centuries on a promontory, near the Roman road, this is all that remains of a feudal residence that passed between the hands of several families. It was once surrounded by a moat and towers, but mudslides have since covered this residence. Round pebbles placed in horizontal layers form this cylindrical building which was probably several storeys high. Arrow-slit windows, typical of mediaeval defence systems, can still be made out today. The wall is very thick, up to two metres in some places. It was occupied by the Rochefort-Villaraymon lords.