The Maison Royale de Saint-Louis was a boarding school for girls set up on 15 June 1686 at Saint-Cyr (what is now the commune of Saint-Cyr-l'École, Yvelines) in France by king Louis XIV at the request of his second wife, Françoise d'Aubigné, Marquise de Maintenon, who wanted a school for girls from impoverished noble families. The establishment lost its leading role on the deaths of Louis and then Maintenon, but it nevertheless marked an evolution in female education under the Ancien Régime. Its notable students included Maintenon's niece Marthe-Marguerite Le Valois de Villette de Mursay, marquise de Caylus, and Napoleon's sister Elisa Bonaparte, grand duchess of Tuscany.