Fête de la Musique 2026
June 21
Free concerts in a grand château park. Bring a blanket and let classical architecture be your backdrop for an open-air summer soundtrack.
Parks & Gardens
Parks & GardensChâteau de Grouchy
Osny
Step inside an 18th-century château that doubles as a town hall, surrounded by 40 hectares of parkland perfect for wandering. Peek into free museums tucked inside: post-impressionist paintings and a surprisingly cool firefighter collection.
Historic architecture
Free museums inside
40-hectare park
Family-friendly stroll
Tips
🎨free William Thornley Museum on 2nd floor
🪿those aren't dog droppings, they're goose droppings
🚒check out the Val-d'Oise firefighter museum in the outbuildings
Upcoming at Château de Grouchy
Sunday, Jun 21
Saturday, Sep 19
Château de Grouchy
Osny
Parks & GardensParks & GardensStep inside an 18th-century château that doubles as a town hall, surrounded by 40 hectares of parkland perfect for wandering. Peek into free museums tucked inside: post-impressionist paintings and a surprisingly cool firefighter collection.
Historic architecture
Free museums inside
40-hectare park
Family-friendly stroll
Tips
🎨free William Thornley Museum on 2nd floor
🪿those aren't dog droppings, they're goose droppings
🚒check out the Val-d'Oise firefighter museum in the outbuildings
Google
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Upcoming at Château de Grouchy
Sunday, Jun 21
Saturday, Sep 19