D. Iogna-Prat, La Maison-Geu. A monumental story of the Church in the Middle Age, Paris, Le Seuil, 2006. In an overall work on Western history of the concept of “territory”, i.e. where communities of belonging are defined, what is the share of the Middle Ages and, more specifically, what is then the main social management structure, the Church? This is the general issue at the heart of the collective research work at the Study Centre...