Pope Urban II's Council of Piacenza covers an important period of medieval history: the so-called "Gregorian Reform" (roughly between 1050-1130), and one of the most important popes of the Middle Ages, Urban II (1088-99).

This three-volume set presents fundamental information about the most important events in world religious history as well as substantive discussions of their significance and impact. This work offers readers a broad and thorough look at the greatest events in world religious history, covering a wide range of religions, time periods, and areas around the globe. The entries present authoritative information and informed viewpoints written by expert contributors that enable readers to easily learn about the chief events in religious history, help them to better understand the course of world history, and promote a greater respect for culturally diverse religious traditions. The first of the three volumes covers religion from the preliterary world through around AD 600; the second, the post-classical era from 600 to 1450; and the third, the modern era from 1450 to the present. Each volume begins with a substantive introduction that discusses the history of world religions during the period covered by the volume. The chronologically ordered entries overview each event, place it in historical context, and identify the reasons for its enduring significance.

This book provides a groundbreaking reinterpretation of the life and career of the preeminent polemicist of the Bishop Bonizo of Sutri. Through a meticulous analysis of Bonizo’s literary works and contemporary reports about his activities, the author uncovers the populist roots of both the bishop’s reform ideology and his vision of holy war against a heretical emperor, Henry IV of Germany. In establishing the predominance of Bonizo’s personal experience as a member of the populist Lombard reform community, the Pataria, in the formation of his thought, this study shatters the picture of a uniform Gregorian party and greatly strengthens the impression of the papal reform movement as a fragile coalition of multiple regional partners, like the Pataria, which enjoyed a fundamental unity of purpose but whose individual constituencies often diverged in their particular strategic objectives. This investigation, moreover, sets Bonizo’s story within the context of the urban life of his native Lombardy and examines the relationship between popular religious reform and the gradual development of communal government in northern Italy.

Though conditioned by the specific circumstances of eleventh-century Europe, the launching of the crusdaes presupposed a long historical evolution of the idea of Christian knighthood and holy war. Carl Erdmann developed this argument first in 1935 in a book that is still recognized as basic to an understanding of how the crusades came about. This first edition in English includes notes supplementing those of the German text, a foreword discussing subsequent scholarship, and an amplified bibliography. Paying special attention to the symbolism of banners as well as to literary evidence, the author traces the changes that moved the Western church away from its initial aversion to armed combat and toward acceptance and encouragement of the kind of holy war that the crusades would represent: a war whose specific cause was religion. Erdmann's analysis stresses the role of church reformers and Gregory VII, without neglecting the "popular" idea of crusade that would assure an astonishingly enthusiastic response to Urban II's appeal in 1095. His book provides an unrivaled account of he interaction of the church with war and warriors during the early Middle Ages. Carl Erdmann (1898-1945) taught at the University of Berlin and was associated with the Monumenta Germania historica. Marshall Baldwin was Professor Emeritus of History at New York University at his death in 1975. Walter Goffart is Professor of History at the University of Toronto. Originally published in 1978. The Princeton Legacy Library uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University Press. These editions preserve the original texts of these important books while presenting them in durable paperback and hardcover editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905.

It is impossible to understand how the medieval church functioned and, in turn, influenced the lay world within its care without understanding "canon law". This book examines its development from its beginnings to the end of the Middle Ages, updating its findings in light of recent scholarly trends. This second edition has been fully revised and updated by Melodie H. Eichbauer to include additional material on the early Middle Ages; the significance of the discovery of earlier versions of Gratian’s Decretum; and the new research into law emanating from secular authorities, councils, episcopal acta, and juridical commentary to rethink our understanding of the sources of law and canon law's place in medieval society. Separate chapters examine canon law in intellectual spaces; the canonical courts and their procedures; and, using the case studies of deviation from orthodoxy and marriage, canon law in the lives of people. The main body of the book concludes with the influence of canon law in Western society, but has been reworked by integrating sections cut from the first edition chapters on canon law in private and public life to highlight the importance of this field of research. Throughout the work and found in the bibliography are references to current literature and resources in order to make researching in the field more accessible. The first appendix provides examples of how canonical texts are cited while the second offers biographical notes on canonists featured in the work. The end result is a second edition that is significantly rewritten and updated but retains the spirit of Brundage’s original text. Covering all aspects of medieval canon law and its influence on medieval politics, society, and culture, this book provides students of medieval history with an accessible overview of this foundational aspect of medieval history.

The pontificate of Innocent II (1130-1143) has long been recognized as a watershed in the history of the papacy, marking the transition from the age of reform to the so-called papal monarchy, when an earlier generation of idealistic reformers gave way to hard-headed pragmatists intent on securing worldly power for the Church. Whilst such a conception may be a cliché its effect has been to concentrate scholarship more on the schism of 1130 and its effects than on Innocent II himself. This volume puts Innocent at the centre, bringing together the authorities in the field to give an overarching view of his pontificate, which was very important in terms of the internationalization of the papacy, the internal development of the Roman Curia, the integrity of the papal state and the governance of the local church, as well as vital to the development of the Kingdom of Sicily and the Empire.

'A nuanced and sophisticated analysis... Exhilarating' Sunday Telegraph Nine hundred years ago, one of the most controversial episodes in Christian history was initiated. The Pope stated that, in spite of the apparently pacifist message of the New Testament, God actually wanted European knights to wage a fierce and bloody war against Islam and recapture Jerusalem. Thus was the First Crusade born. Focusing on the characters that drove this extraordinary campaign, this fascinating period of history is recreated through awe-inspiring and often barbaric tales of bold adventure while at the same time providing significant insights into early medieval society, morality and mentality. The First Crusade marked a watershed in relations between Islam and the West, a conflict that set these two world religions on a course towards deep-seated animosity and enduring enmity. The chilling reverberations of this earth-shattering clash still echo in the world today. '[Asbridge] balances persuasive analysis with a flair for conveying with dramatic power the crusaders' plight' Financial Times