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Atria Larson, Ph.D.

Visiting Assistant Professor
Theological Studies

Office Hours

W: 11-noon; TR: 9:45-10:45 a.m.

Courses Taught

Theological Foundations, Capstone Seminar: Peter Lombard, Teachers in Medieval Christianity, HEO 2320: Seeking God and Building Faith in the Middle Ages


Ph.D. in Medieval Studies (History, Theology, Philosophy), The Catholic University of America, 2010
M.A. in Medieval Studies, Catholic University of America, 2006
B.A. in Interdisciplinary Studies (History, Philosophy, English), Covenant College, 2003

Research Interests

History of canon law, history of penance, and medieval manuscripts.

Labs and Facilities

Atria Larson's website

Publications and Media Placements

"Edited with Keith Sisson, A Companion to the Medieval Papacy: Growth of an Ideology and Institution, Brill’s Companions to the Christian Tradition 70 (Leiden: Brill, 2016).

Gratian’s Tractatus de penitentia: A New Latin Edition with English Translation (Studies in Medieval and Early Modern Canon Law 14; Washington, DC: Catholic University of America Press, 2016).

Master of Penance: Gratian and the Development of Penitential Thought and Law in the Twelfth Century (Studies in Medieval and Early Modern Canon Law 11; Washington, DC: Catholic University of America Press, 2014).

“Archiepiscopal and Papal Involvement in Episcopal Elections: The Origins and Reception of Lateran IV cc.23-24 from the Third Lateran Council to the Liber Sextus,” Zeitschrift der Savigny-Stiftung für Rechtsgeschichte, Kanonistische Abteilung 102 (2016), 73-98.

“Killing a Career: Homicide and the Development of Medieval Clerical Discipline,” The Jurist 74:2 (2014): 247-70.

“Gratian’s De penitentia in Twelfth-Century Manuscripts,” Bulletin of Medieval Canon Law 31 (2014): 57-110.

“The Reception of Gratian’s Tractatus de penitentia and the Relationship between Law and Theology in the Second Half of the Twelfth Century,” Journal of Religious History 37:4 (2013): 457-73.

“An Abbreviatio of the First Recension of Gratian’s Decretum in Munich?,” Bulletin of Medieval Canon Law 29 (2011-2012): 51-118. With Richard Engl, “Ein unbeachtetes Zeugnis zum dritten Laterankonzil: Bernardo Maragones Annales Pisani,” Zeitschrift der Savigny-Stiftung für Rechtsgeschichte, Kanonistische Abteilung 97 (2011): 357-68.

“The Influence of the School of Laon on Gratian: The Usage of the Glossa ordinaria and Anselmian Sententie in De penitentia (Decretum C.33 q.3),” Mediaeval Studies 72 (2010): 197-244.

“Bestowing Pardon and Favor: Emperor Henry III’s Pardons in Context,” Viator 40:1 (2009): 41-69.

“Early Stages of Gratian’s Decretum and the Second Lateran Council: A Reconsideration,” Bulletin of Medieval Canon Law 27 (2007): 21-56.

“The Evolution of Gratian’s Tractatus de penitentia,” Bulletin of Medieval Canon Law 26 (2004-2006): 59-123.

“Passive Instrument and Active Intercessor: Anselm’s View of Mary’s Role in Redemption,” Cistercian Studies Quarterly 41:1 (Feb. 2006): 31-50."

Honors and Awards

"Spark Microgrant:""Law within Religion; Religion with the Law,"" Office of the Vice President for Research, Saint Louis University, 2017 Manfred Lautenschlaeger Award for Theological Promise, Forschungszentrum für Internationale und Interdisziplinäre Theologie, Universität Heidelberg

2015 Mellon Grant, Vatican Film Library, Saint Louis University,

Fall 2013 Fulbright Award in Munich, Germany, Sept. 2009-July 2010

Professional Organizations and Associations

Iuris Canonici Medii Aevi Consociatio (International Society of Medieval Canon Law); The Medieval Academy of America; American Historical Association