Château de Grouchy stands as an 18th-century architectural gem in Osny, Val-d'Oise, about 30 kilometres northwest of Paris. Built on the remains of a 17th-century estate, this neoclassical castle features beautiful grounds encompassing around forty hectares with an English garden, ornamental pond, and historic garden structures including a columned temple. Named after its final private owner, Marquis Jean de Grouchy, the château now hosts the town hall and houses cultural institutions including the William Thornley museum dedicated to the Post-Impressionist painter, alongside a gallery and firefighters' museum. Visitors can explore the elegant park and parterre gardens while experiencing exhibitions and cultural events throughout the year.
