sentences:  Paul de Beauvilliers, duc de Beauvilliers and later duc de Saint-Aignan, bought the château in 1699, modernized some of its interiors and decorated it with sufficient grandeur to house the duc d'Anjou on his way to become king of Spain in 1700.His eventual heir was forced to sell Chaumont to pay his debts to a "maître des requêtes ordinaire" to Louis XV, Monsieur Bertin, who demolished the north wing built by Charles II d'Amboise and the Cardinal d'Amboise, to open the house towards the river view in the modern fashion.In 1750, Jacques-Donatien Le Ray purchased the castle as a country home where he established a glassmaking and pottery factory.