In Osny, the Château de Grouchy and its grounds welcome the 2026 Fête de la Musique, set against a backdrop of historic architecture and lush greenery. An outdoor outing to enjoy concerts this Sunday, June 21, 2026.
The Château de Grouchy in Osny (95) will once again host the Christmas village and its activities from December 5 to 7, 2025. Don't miss the concerts and shows, the ice rink, and of course the unmissable fireworks display!
The Château de Grouchy in Osny (95) opens the gates of fright for Halloween, on October 31, 2025. With pumpkin contests, bewitching tales and an immersive haunted trail, get ready for an evening of mystery and magic. So... are you ready to shiver in the dark corridors of this historic Val-d'Oise monument?
