This event is in the past.It took place on September 21, 2025 at Château de Grouchy.










Step into an 18th-century estate built on feudal ruins, now home to Osny's town hall, a sculpture and painting exhibition, plus France's only public collection dedicated to painter Victor Le Baube. The restored attic museum and grand reception rooms open their doors for two afternoons only.
Historic château
Free weekend access
Art exhibitions
Museum in the attic
Journées du Patrimoine 2025










Step into an 18th-century estate built on feudal ruins, now home to Osny's town hall, a sculpture and painting exhibition, plus France's only public collection dedicated to painter Victor Le Baube. The restored attic museum and grand reception rooms open their doors for two afternoons only.
Historic château
Free weekend access
Art exhibitions
Museum in the attic
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