Giles Constable

Past Professor
School of Historical Studies

Medieval History


Historical Studies

Giles Constable was a vigorous explorer of medieval religious and intellectual history whose expansive work has provided new and authoritative perspectives on the Middle Ages. 

A giant in the field of medieval history, Giles Constable is the author or editor of more than twenty books on medieval religious and intellectual history. His most influential works, centered around the religious and cultural history of the twelfth century, illuminated the origins of monastic tithes, Peter the Venerable, the people and power of Byzantium, medieval religious and social thought, the reformation of the twelfth century, twelfth-century crusading, and the history of Cluny.

Dates at IAS

School of Historical Studies
School of Historical Studies


Harvard University
Harvard University


Académie des Inscriptions et Belles-Lettres, Institut de France, Foreign Associate
Accademia Nazionale dei Lincei, Foreign Member
American Historical Association, Member
American Philosophical Society, Fellow
Bavarian Academy of Sciences, Corresponding Member
British Academy, Corresponding Member
Guggenheim Fellowship for Humanities in 1967
Instituto Lombardo, Accademia di Scienze e Lettere, Foreign Member
Royal Historical Society, Corresponding Fellow


Harvard University
Professor 1977–85, Director of Dumbarton Oaks Research Library and Collection 1977–84, H. C. Lea Professor of Medieval History 1966–77, Associate Professor 1961–66, Assistant Professor 1958–61
The University of Iowa
Instructor and Assistant Professor