André Vauchez is Professor Emeritus of Medieval History at Université Paris Nanterre. A member of the Académie des Inscriptions et Belles-Lettres, he was awarded the Balzan Prize in 2013 for his lifetime's work in history. His books in English include Sainthood in the Later Middle Ages; Francis of Assisi; and Catherine of Siena.

Michael F. Cusato is a Franciscan friar and scholar-in-residence at St. Bonaventure University who has published widely on the history of the Franciscan order during the Middle Ages.