Jas Elsner is Professor of Late Antique Art at the University of Oxford and Humfry Payne Senior Research Fellow in Classical Archaeology and Art at Corpus Christi College, Oxford. He is also Visiting Professor of Art and Religion at the University of Chicago, and External Scientific Member of the Kunsthistorisches Institut in Florenz. He is a Member of the American Academy of Arts and Sciences and of the Max Planck Society, as well as a Fellow of the British Academy. He works on all areas of art and religion in antiquity and the early middle ages across Europe and Western Asia, including pilgrimage, travel-writing, and the description of art in texts, and is particularly interested in the problems of comparativism in art history. Along with the other contributors to this book, he is a member of the Center for Global Ancient Art at the University of Chicago which is committed to comparative study of archaeological and art historical issues in all cultures across the ancient world.