Exhibitions
- God's Minstrel: St. Francis of Assisi. The Walters Art Gallery, Baltimore. 1982.
- Time Sanctified: The Book of Hours in Medieval Art and Life. The Walters Art Gallery, Baltimore. 1988.
- Manuscript Painting in the Renaissance. The Walters Art Gallery, Baltimore. 1989-1990.
- Dressed in Gold: Books of the Italian Renaissance. The Walters Art Museum, Baltimore. 2005-2006.
- The Saint Francis Missal. The Walters Art Museum, Baltimore. 2020.