This book was first published in 1980. Walter Ullmann made substantial contributions to many areas of medieval studies, and to those of papal history and cannon law particularly, which have been distinguished by quality and quantity alike. The bibliography of his published work included in this volume contains almost four hundred items. No less influential for generations of students have been his teaching and lecturing, especially at Leeds and from 1949 to 1978 at Cambridge. In Authority and Power friends and former pupils combined to mark his retirement from the Cambridge Chair of Medieval History, with each contributor writing on or near the subject originally studied under Professor Ullmann's supervision. The essays serve both to acknowledge a sense of shared indebtedness to Professor Ullmann and to indicate new approaches and developments, as they were at the time, in legal-historical scholarship.

Table of Contents:
Foreword; List of abbreviations; 1. The alleged territoriality of Visigothic law P. D. King; 2. Some Carolingian law-books and their function Rosamond McKitterick; 3. The earliest surviving royal Ordo: some liturgical and historical aspects Janet L. Nelson; 4. The Epistola Widonis, ecclesiastical reform and canonistic enterprise 1049–1141 John Gilchrist; 5. Ralph de Diceto, Henry II and Beckett (with an appendix on decretal letters) Charles Duggan and Anne Duggan; 6. Fides et culpa: the use of Roman law in ecclesiastical ideology E. F. Vodola; 7. Hostiensis on Per venerabilem: the role of the College of Cardinals J. A. Watt; 8. Centre and locality: aspects of papal administration in England in the later thirteenth century Jane Sayers; 9. The Spanish Church revisited: the episcopal gravamina of 1279 Peter Linehan; 10. Ockham and the birth of individual rights Arthur Stephen McGrade; 11. Public expediency and natural law: a fourteenth-century discussion on the origins of government and property Brian Tierney; 12. The King's Hall, Cambridge and English medieval collegiate history Alan B. Cobban; 13. A fourteenth-century contribution to the theory of citizenship: political man and the problem of created citizenship in the thought of Baldus de Ubaldis Joseph P. Canning; 14. What was conciliarism? Conciliar theory in historical perspective A. J. Black; 15. The problem of the cardinalate in the Great Schism R. N. Swanson; 16. Paulus Vladimiri's attack on the just war: a case study in legal polemics Frederick H. Russell; Bibliography of the writings of Walter Ullmann Peter Linehan.