The Château de Montmorency was an 18th-century mansion in Montmorency, Val-d'Oise of which today only a few vestiges remain.
History
In 1670, Charles Le Brun, the first painter to King Louis XIV, acquired some land on which he built his country house, later called the "petit château" (small house).
Following Le Brun's death in 1690, the property was bought in 1702 by the financier and art collector Pierre Crozat who had his own magnificent "grand château" (large house) built within the park to a design by the architect Jean-Sylvain Cartaud.
He turned his country seat into the centre of social gatherings which inspired Crozat's protégé Antoine Watteau for some of his paintings.
Described by Dézallier d'Argenville in his Voyage pittoresque des environs de Paris, ou, Description des maisons royales, chateaux & autres lieux de plaisance, situés à quinze lieues aux environs de cette ville, 1779. Available online from Biodiversity Heritage Library: https://www.biodiversitylibrary.org/item/64431#page/11/mode/1up.