A former member of the l’École française de Rome, Gilles Ferragu is Associate Professor in Modern History at l’université Paris Ouest-Nanterre and Sciences Po, and a member of l’Institut des sciences sociales du politique. A specialist in the history of international relations, and its religious aspects in particular, he has worked on the relations between France, Italy, and the Vatican, diplomat writers, diplomacy and the media, as well as the history of terrorism and hostages. His publications include: Lyautey. La fabrique du héros colonial, Paris, Belin, 2014 ; and Histoire du terrorisme, Paris, Perrin, 2014. He has also co-edited Écrivains et diplomates. L’invention d’une tradition, xixe-xxie siècles, Paris, Armand Colin, 2012 (with Laurence Badel, Stanislas Jeannesson, and Renaud Meltz); and Diplomatie et religion. Au cœur de l’action culturelle de la France au xxe siècle, Paris, Éditions de la Sorbonne, 2016 (with Florian Michel).