Château d'Anet
Louise Françoise would never marry; dying at the Château d'Anet at the age of 35 having been "taken ill while out riding", noted by the duc de Luynes; he noted also "No sooner was she placed in her carriage than she fainted away. She never recovered consciousness, and died a few hours later". She left her profitable pensions to her first cousin Élisabeth Alexandrine de Bourbon, "Mademoiselle de Sens"; daughter of her namesake "Madame la Duchesse".