The iconography of the heart and the cross in René d’Anjou’s Mortifiement and George Chastelain’s Douze Dames the Rhétorique. A dialogue with Jean Gerson This study considers the relationship between Gerson’s spirituality and certain ideological and iconographic elements (the heart and the crucifixion) of the Mortifiement de Vaine Plaisance by René d’Anjou (1455) and the Enseignes des Douze Dames de Rhétorique by George Chastelain (1463), from the perspective of an examination of some Burgundian manuscripts of the works in question. It sheds light on the place of Gerson in the literary and aristocratic culture of the 15th Century and attempts to show the role played by spirituality in the life of the court and in the representations of authority.