"Prayer is real religion," said Auguste Sabatier. If so, the academic study of prayer allows scholars to examine the very heart of religious practices, beliefs, and convictions. Since prayers exist in a wide variety of content, contexts, forms, and practices, a comprehensive approach to the study of prayer is required. Therefore, this volume includes scholars from a wide range of disciplines, in order to discover the breadth of "real religion" from the first to the fifteenth centuries. This volume especially focuses upon the history of Christianity and monasticism, where prayer was the school...