In 1675, the king gave her the title of Marquise de Maintenon after the name of her personal estate. This favour incurred Madame de Montespan's jealousy. At court, she was now known as Madame de Maintenon, as a result of King Louis buying her and estate at Maintenon. It has been suspected that Maintenon and King Louis a private marriage ceremony between October 1683 and January 1684. King Louis' wife Queen Marie Thérèse died in July 1683. As a result of her birth Maintenon would never be acknowledged as Louis' wife or as Queen. She founded the "Maison royale de Saint Louis", a school for girls from poorer noble families, in 1684.