Gawdat Gabra is the former director of the Coptic Museum and the author‎,‎ coauthor‎,‎ or editor of numerous books on the history and culture of Egyptian Christianity‎,‎ including The Treasures of Coptic Art ‎(‎AUC Press‎,‎ 2006‎)‎ and The Churches of Egypt ‎(‎AUC Press‎,‎ 2007‎)‎‎.‎ He is currently visiting professor of Coptic studies at Claremont Graduate University‎,‎ California‎.‎Gertrud J‎.‎M‎.‎ van Loon specializes in Coptic art and archaeology‎.‎ She holds a PhD from Leiden University‎.‎ She is currently a fellow at the Catholic University of Leuven in Belgium‎.‎ She is the coauthor of The Churches of Egypt ‎(‎AUC Press‎,‎ 2007‎)‎‎.‎Stefan Reif is professor emeritus of medieval Hebrew studies and fellow of St John‎'‎s College at the University of Cambridge‎.‎ He is the author of many books and articles‎,‎ including most recently A Jewish Archive from Old Cairo‎,‎ Problems with Prayers‎,‎ and Charles Taylor and the Genizah Collection‎.‎Tarek Swelim earned his PhD in Islamic art and architecture from Harvard University‎.‎ He has taught at the‎.‎‎.‎‎.‎