Rosamund McKitterick is Professor of Medieval History at the University of Cambridge and Fellow of Sidney Sussex College. She has published on literacy, manuscript transmission, perceptions of the past, and political culture in the early Middle Ages. In addition to many articles, chapters in books, edited books and monographs, her most recent books include History and Memory in the Carolingian World (Cambridge, 2004), Charlemagne: The Formation of a European Identity (Cambridge, 2008), and Rome across Time and Space: Cultural Transmission and the Exchange of Ideas, c.5001400 (with C. Bolgia and J. Osborne, Cambridge, 2011). John Osborne is Dean of the Faculty of Arts and Social Sciences at Carleton University, Ottawa. His publications cover topics as varied as the Roman catacombs, the fragmentary mural paintings from excavated churches such as San Clemente and S. Maria Antiqua, the decorative program of the church of San Marco in Venice, seventeenth-century antiquarian drawings of medieval monuments, cultural transmission between Western Europe and Byzantium, and the medieval understanding and use of Rome's heritage of ancient buildings and statuary. Carol M. Richardson is Lecturer in the History of Art at the University of Edinburgh. Her book Reclaiming Rome: Cardinals in the Fifteenth Century (2009) was described as 'a milestone in the history not only of artistic patronage but also of the papacy in fifteenth-century Rome [which] will become a standard work for scholars to return to again and again' (Simon Ditchfield, Art History 34/1 (2011)). She has also edited a number of Open University textbooks which are widely used to teach history of art on both sides of the Atlantic. Joanna Story is Professor of Early Medieval History at the University of Leicester, specialising in interdisciplinary research into the history and archaeology of Europe in the age of Charlemagne. She has published widely on the contacts between Anglo-Saxon England and the Continent at this time, focusing especially on manuscripts and inscriptions, and the links between England and Rome.