Many historians of medieval art now look beyond soaring cathedrals to study the relationship of architecture and image-making to life in medieval society. In The Art of Healing, Marcia Kupfer explores the interplay between church decoration and ritual practice in caring for the sick. Her inquiry bridges cultural anthropology and the social history of medicine even as it also expands our understanding of how clergy employed mural painting to cure body and soul.

Looking closely at paintings from ca. 1200 in the church of Saint-Aignan-sur-Cher, a castle town in Central France,...