Combebonnet would have originally been the center of a rural exploitation. To defend it, its owner would have built a small fortress. The original castle had the shape of a right triangle whose east and west angles were topped with cantilevered watchtowers. Two of the sides were naturally fortified. At the end of the 13th or beginning of the 14th century, a square tower armed with cross pattée loopholes was added to the north corner. The castle was remodeled and enlarged at the end of the 15th or beginning of the 16th century. It was perhaps at this time that buildings, now demolished, were attached to the east, and a chapel was built as well as the enclosure which defended some houses. In the 17th century, the castle was extended on the north side. The two semi-circular portals decorated with columns, giving access to the courtyard, date from this period. To the west stands a chapel with a flat apse.