Lecture organized as part of the cycle " Les jeudis du Cnam - Dialogues avec le Collège de France ", with Patrick Boucheron, historian, holder of the chair Histoire des pouvoirs en Europe occidentale, XIIIth- XVIth siècle at the Collège de France, and Stéphane Delalande, materials specialist, holder of the chair Matériaux avancés et procédés innovants at the Cnam.
Moderated by : Alexandra Delbot, producer at France Culture.
