Château de Comborn, Medieval fortress in Orgnac-sur-Vézère, France.

Château de Comborn is a ruined fortress on a narrow rocky spur about 70 metres above a bend of the Vézère. Its surviving medieval parts are a four-storey keep of which only the first level remains, a square tower, a chapel with a crypt, underground halls and an enclosing wall. The residential building dates from 1753. The site is private property.

The site was occupied since Antiquity, as excavations in 2002 showed, and was an oppidum in the 9th century. In the 10th century it became the cradle of the viscounty of Comborn, one of four in the Bas-Limousin, and in the 12th and 13th centuries it belonged to the viscounts of Limoges. The castle was destroyed during the Hundred Years' War; from 1436 Jean I rebuilt a residence and a chapel consecrated in 1455 to Saint Madeleine. A fire in the mid-17th century led to the 1753 reconstruction of the logis by the Marquis du Saillant.

The name Comborn comes from the family that held the viscountcy, one of four in the Bas-Limousin. Since 2022 the Vieilles Maisons Françaises association and the Belle Main fund have financed restoration of old furniture in the "chambre de Mirabeau", and the Fondation pour la Sauvegarde de l'Art Français has funded work on the chapel remains.

The site is reached by footpaths leading up from the surrounding landscape, though the steep climb requires reasonable fitness. Sturdy footwear is recommended and visitors should allow time for both the ascent and descent.

The site attracted visitors from French nobility, including the future revolutionary Mirabeau, who came to visit his sister. This connection to well-known historical figures shows that the fortress held social importance beyond its military role.