Peter D. ClarkePeter Clarke specialises in medieval religious history, in particular the papacy and canon law. He is author of the monograph The Interdict in the Thirteenth Century: A Question of Collective Guilt (2007) and of numerous articles. His most recent keypublication (co-edited with Patrick N. R. Zutshi) is Supplications from England and Wales in the Registers of the Apostolic Penitentiary, 1410–1503, 3 volumes, Canterbury and York Society Series 103-105 (2013–15). He has also co-edited volumes 45-49 in the series Studies in Church History and is a Fellow of the Royal Historical Society. Read More Read Less