Château d'O
About Château d'O
Château d'O is the only classé historic monument in Mortrée, the higher of France’s two levels of protection. It is built in the Gothic style. It dates from the 15th–18th c. Part of it has been classé since 1964.
Le château d'Ô est une demeure, de la fin du XVe siècle remanié aux XVIe et XVIIe siècles, qui se dresse sur le territoire de la commune française de Mortrée, dans le département de l'Orne, en région Normandie. L'édifice est partiellement protégé au titre des monuments historiques.
From Wikipédia (French), article “Château d'Ô (Orne)” · CC BY-SA 4.0 · read October 28, 2026
MHRead its Mérimée recordThe Culture ministry’s notice PA00110871 on POP↗Classé is the highest protection: no work may be done on the building without the State’s permission, and the State’s architects watch over it.
Finding Château d'O
Mortrée
Other buildings like it nearby among the classé monuments
With a photo, within 25 mi; other towns first.
Questions about Château d'O
Is Château d'O protected?
Yes. It is classé, the higher of France’s two levels of protection as a historic monument since 1964 (Mérimée record PA00110871). The protection covers part of the building.
Can you visit Château d'O?
The list doesn’t say when it is open. Many monuments open on the Journées européennes du patrimoine in September; the town hall or tourist office can tell you more.
When was Château d'O built?
By the list’s record, it dates from the 15th–18th c.
Sources: Ministère de la Culture, Mérimée base on POP (immeubles protégés au titre des monuments historiques), October 2026 · Wikimedia Commons and Wikidata (photos of the monuments, each with its own credit and license) · IGN Admin Express (boundaries). Under the Licence Ouverte / Open Licence 2.0 (Etalab).
Contains public sector information under the Licence Ouverte / Open Licence 2.0 (Etalab): INSEE, DGFiP, the Interior Ministry’s statistics service (SSMSI), the Ministry of Education (DEPP), the Health Ministry’s statistics service (DREES) and the Housing Ministry (Carte des loyers). Commune boundaries: IGN Admin Express.