A Companion to the Medieval Papacy brings together an international group of experts on various aspects of the medieval papacy. Each chapter provides an up-to-date introduction to and scholarly interpretation of topics of crucial importance to the development of the papacy’s thinking about its place in the medieval world and of its institutional structures. Topics covered include: the Papal States; the Gregorian Reform; papal artistic self-representation; hierocratic theory; canon law; decretals; councils; legates and judges delegate; the apostolic camera, chancery, penitentiary, and Rota; relations with Constantinople; crusades; missions. The volume includes an introductory chapter by Thomas F.X. Noble on the historiographical challenges of writing medieval papal history. Contributors are: Sandro Carocci, Atria A. Larson, Andrew Louth, Jehangir Malegam, Andreas Meyer, Harald Müller, Thomas F.X. Noble, Francesca Pomarici, Rebecca Rist, Kirsi Salonen, Felicitas Schmieder, Keith Sisson, Danica Summerlin, and Stefan Weiß.