Listed as an historic monument, the Château de Grouchy takes place about thirty kilometers from Paris, in the town of Osny, in Val-d'Oise. Built at the end of the 18th century on the remains of the vaulted cellars of a first 17th century building, it was originally owned by Charles-Malo-François, Count of Lameth.
Passed from hand to hand over the centuries before being bought by the municipality to be opened to the public, this classic-style building now houses the town hall, a gallery of paintings, the William Thornley space dedicated to the eponymous painter or even a very interesting museum of firefighters which presents vehicles, helmets, medals or even dressed mannequins.
A park of around forty hectares completes the site's offer, revealing in particular an English garden and a pond with a small island. Several garden factories are also still visible, including a peristyle with seven columns nicknamed the Temple of Love.
