The German Episcopacy and the Implementation of the Decrees of the Fourth Lateran Council, 1216-1245: Watchmen on the Tower By Paul B. Pixton. [Studies in the History of Christian Thought, Volume LXIV] (Leiden: E. J. Brill. 1995. Pp. xv, 543. $135.00.) The Fourth Lateranum was the most important medieval council. Its seventy canons on such subjects as transubstantiation, the Jews, marriage, and auricular confession have shaped Western culture. The conciliar decrees were to be executed by annual provincial and diocesan synods, episcopal visitations, and triennial general chapters of regulars. Paul B. Pixton examines the implementation of its edicts in Germany before the First Council of Lyons (1245). Innocent III's reform program built on a tradition of synodal activity, but ecclesiastical discipline had broken down after the double election of 1198. The success of Innocent's plans depended on the zeal of individual prelates like Archbishops Dietrich II of Trier and Eberhard II of Salzburg and after 1224 on the leadership of the legate, Cardinal Conrad of Porto. Pixton concludes that this reform effort failed for a number of reasons: the impossibility of reforming society through legislation, the renewal of the papal-imperial conflict, and the contradiction between the council's emphasis on episcopal authority and Roman appellate jurisdiction. This book will be a reference work for any English-speaking scholar who is interested in the thirteenth-century German Church. Nevertheless, I was disappointed. First, anyone who attempts to synthesize what happened in six ecclesiastical provinces will make mistakes that a specialist is likely to spot. Let me cite a few of Pixton's factual errors about Salzburg. Reichenhall is in Bavaria, not Tyrol; Gerhoch of Reichersberg was a provost, not an abbot; St. Victor is the Cistercian abbey of Viktring (pp. 27-31); Eberhard II was a noble, not a ministerial, whereas Rudiger of Radeck, the first bishop of Chiemsee, was an archiepiscopal ministerial, not a noble (p.199); the bishopric of Vienna was established in 1469, not in the late thirteenth century (p. 217); St. Lambrecht is in Styria, not Carinthia (p. 231); and Archbishop-Elect Philip was a Spanheimer, not an Ortenburg (p. 453). None of this is very significant, and I suspect that there are fewer mistakes in the treatment of Mainz and Trier where Pixton is more at home, but some caution is in order. Second, Pixton presents the information "in a chronological fashion in order to reveal relationships between diocesan and provincial synods of specific regions of Germany, and also to suggest the response to papal, legatine, and archiepiscopal stimuli" (p. …