In 1743, King Louis XV acquired the marquisate of La Ferte-Imbault for his mistress, Madame de La Tournelle, on whom he wanted to confer a prestigious title to present to the court. Madame de La Tournelle eventually became Duchesse de Châteauroux. The last marquise de La Ferté-Imbault was Marie-Thérèse Geoffrin d'Estampes, daughter of the illustrious Madame Geoffrin, whose literary salon in the rue Saint-Honoré radiated throughout Europe and as far as Russia where the Empress Catherine II wrote to her as a friend. The beautiful marquise, whose magnificent painting by Nattier is exhibited in Tokyo at the Fuji Art Museum, enjoyed at La Ferté "the freshness of large chestnut trees that extend their shade at the end of the Commons". Her presence was, however, requested in Versailles, where, on the recommendation of the governess of the Enfants de France, the comtesse de Marsan, Louis XV asked her to teach philosophy to his granddaughters, the Princesses Elisabeth and Clotilde de France (sisters of the Duc de Berry, future Louis XVI). She also provided Madame de Marsan with texts for the little comedies played by the princesses to whom the Dauphin and the Dauphine (Marie Antoinette) were present. Madame de La Ferté-Imbault will be invited to the coronation of Louis XVI in Reims on June 11, 1775. Smart, a woman of letters having regularly attended in the salon of her mother most of the great minds of the Enlightenment (Diderot, Voltaire, Fontenelle, Montesquieu who was his tutor, D'Alembert ...), and never remarried despite his young widowhood (and several marriage proposals including that of Stanislas Leszczynski, King of Poland, and father of the Queen of France Marie Leszczynska, who called la marquise "his Imbault" ), Madame de La Ferté-Imbault was recognized for her culture and her moral qualities. Queen of the "Sublime Order of Lanturelus", brotherhood of beautiful minds, she knows how to resist the intrigues of the Court, and attach the friendship of the Royal Family (including Madame Elizabeth who wrote to her "You must love, said a princess.