This book offers a history of the first thousand years of Christianity. Ranging across the Christian world from China to Iceland, the narrative illustrates the diversity of Christian beliefs and practices. It also places the rise of Christianity in the context of other religious traditions, especially Islam. The author draws penetrating portraits of individuals and communities, from St. Patrick and the Irish Church to the Christian communities of Armenia and Mesopotamia.` `For the second edition, the book has been thoroughly rewritten and expanded. It includes two new chapters, on monasticism and Irish Christianity. The author has also added an extensive introduction in which he reflects on the scholarly traditions that have influenced his work and explains his current thinking about the book's themes. The revised edition contains new maps, a substantial bibliography, and a number of chronological tables to guide readers.