• Tierney, Brian, The Crisis of Church and State 1050-1300. Medieval Academy Reprints for Teaching 21 (Toronto etc.: University of Toronto Press, 1988).

  • Armstrong, Regis, et al., eds., Francis of Assisi: Early Documents 1. The Saint (New York etc.: New City Press, 1999).

  • Pernoud, Régine, Joan of Arc by Herself and her Witnesses, trans. Edward Hyams (New York: Dorset Press, 1988).

  • Robinson, Ian S., Henry IV of Germany, 1056–1106 (Cambridge: Cambridge University Press, 1999).

  • Vauchez, André, Francis of Assisi: The Life and Afterlife of a Medieval Saint, trans. Michael F. Cusato (New Haven & London: Yale University Press, 2012).

  • Hobbins, Daniel, The Trial of Jeanne d’Arc (Cambridge: Harvard University Press, 2005).

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