This volume is concerned, above all, with the legal background and the juristic issues behind the ideology and practice of the medieval Crusades. This is an area that the author was the first to investigate systematically, and there are two particular reasons for his approach: one, the conviction that the historical phenomenon of the Crusades can only be adequately understood within the context of the legal systems that permeated the age; the other, that so much of the documentary evidence a be it charters, decrees even chronicles a was produced by people whose perceptions had been shaped by...