Kriston's research interests include medieval canon law, papal legation, the Roman Church and the papacy, monastic exemption, and religious history more generally. His current research project examines how memory and heritage have come to be so closely linked in western culture, using the singular and pivotal case of the Benedictine abbey of Monte Cassino (est. 529) to analyse the historical process of remembering and its impact on modern representations of the past. He has held various research fellowships in Germany (2015-16), Belgium (2015), the USA (2014), Australia (2013), and England (2012).
Kriston teaches on medieval heresy, the plague in medieval and early modern Europe, the Crusades, and historical theory and method. His supervision interests span the entire Middle Ages, with a particular expertise on religious history.
Fellow of Royal Historical Society; Co-editor of the Journal of Religious History