The feudal castle of Mielmont rises on a rocky spur overlooking the valley of the Orneau in a very beautiful wooded site, this fortress of irregular plan defended by the relief of the terrain, except to the east where a moat protects the entrance, the building was built in limestone rubble punctuated with towers, and was built from the twelfth to the twentieth century around a more or less triangular courtyard open on the valley. From the 12th century, the square mass of a high dungeon, emerging today from the surrounding buildings and topped with a slate bulb topped with a bell, and the polygonal outline of the enclosure, even the masterpiece of the north curtains, which keeps the remains of a latrine, remain mainly in the south where a walled arch is at the base. The dungeon predates the ramparts to which it is connected. In the 16th century, construction of the south wing began by the Dave family. Original openings in the courtyard façade, including cross-linked windows. In the center, a traditional façade dated to a cellar door on 24 May 1875, a period of important work carried out by the Counts of Beaufort from 1870 to 1875, resulting in the neo-Gothic chapel hanging on the western end of the wing.
