Marie-Aurore de Saxe, known after her first marriage as Countess of Horn and after the second as Madame Dupin de Francueil, was an illegitimate daughter of Marshal Maurice de Saxe and a grandmother of George Sand.
A notable free-thinker, she was interested in philosophers like Voltaire, Jean-Jacques Rousseau and Buffon. Her life was marked by the vicissitudes of history and personal dramas.