Louise Dupin
In 1733 the estate was sold for 130,000 livres to a wealthy squire named Claude Dupin. His wife, Louise Dupin, was the natural daughter of the financier Samuel Bernard and the actress Manon Dancourt, whose mother was also an actress who had joined the Comédie Française in 1684. Louise Dupin was "an intelligent, beautiful, and highly cultivated woman who had the theatre in her blood." Claude Dupin, a widower, had a son, Louis Claude, from his first wife Marie-Aurore de Saxe, who was the grandmother of George Sand (born Aurore Dupin).
Louise Dupin's literary salon at Chenonceau attracted such leaders of the Enlightenment as the writers Voltaire, Montesquieu, and Fontenelle, the naturalist Buffon, the playwright Marivaux, the philosopher Condillac, as well as the Marquise de Tencin and the Marquise du Deffand. Jean-Jacques Rousseau was Dupin's secretary and tutored her son. Rousseau, who worked on Émile at Chenonceau, wrote in his Confessions: "We played music there and staged comedies. I wrote a play in verse entitled Sylvie's Path, after the name of a path in the park along the Cher."
The widowed Louise Dupin saved the château from destruction during the French Revolution, preserving it from being destroyed by the Revolutionaries because "it was essential to travel and commerce, being the only bridge across the river for many leagues."