The Château de Groussay is located in the town of Montfort-l'Amaury, in the Department of Yvelines, west of Paris, in France. The Château was built in 1815 by the duchesse de Charest, a daughter of Louise Elisabeth de Croÿ-Havré, marquise de Tourzel, the governess of the royal enfants de France of Louis XVI and Marie Antoinette.