This scarce antiquarian book is a facsimile reprint of the original. Due to its age, it may contain imperfections such as marks, notations, marginalia and flawed pages. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions that are true to the original work.

Roberto Rusconi is Professor of the History of Christianity in the Department of History at the University of Aquila. Blair Sullivan is a medieval scholar at the Center for Medieval and Renaissance Studies, University of California, Los Angeles.