The Madelonnettes Convent (couvent des Madelonnettes) was a Paris convent in the IIIe arrondissement of Paris. It was located in what is now a rectangle between 6 rue des Fontaines du Temple (where there are the remains of one of its walls), rue Volta and rue du Vertbois, and part of its site is now occupied by the lycée Turgot. As the Madelonnettes Prison (prison des Madelonnettes) during the French Revolution, its prisoners included the writers the Marquis de Sade and Nicolas Chamfort, the politician Jean-Baptiste de Machault d'Arnouville and the actor Dazincourt.