Château de Diant, Medieval castle in Diant, France.

Château de Diant consists of a white multi-storey building with a dark roof and a central pediment pierced by a circular window, its facade lined with dark-framed rectangular windows and roof dormers. To its right stands a round tower of rough grey stone under a dark conical roof, and a low stone wall with rounded coping runs in front of the building, behind a grassy lawn scattered with fallen leaves.

Château de Diant was first built in the 13th century for a companion of King Philippe Auguste. It was added to and modified in the 15th century and again in the first half of the 19th century. The castle and its gardens have been protected as a monument historique by the French Ministry of Culture since 1946.

The château and its gardens have been listed as monuments historiques since 1946. Both remain private property, so the site is seen from the road rather than visited: the white main building with its pediment and the round grey stone tower with a conical roof stand behind a low stone wall and a lawn.

The castle remains in private ownership and is not open to the public for visits. The best time to view the exterior structure and moat from outside is during clear weather when architectural details are most visible.

The castle and its gardens have been listed as monuments historiques since 1946, and both are private property closed to visitors. The gardens carry their own listing alongside the building, so the protection covers the grounds as well as the 13th-century structure.