Exhibitions
- The International Style: The Arts in Europe Around 1400. The Walters Art Gallery, Baltimore. 1962.
- God's Minstrel: St. Francis of Assisi. The Walters Art Gallery, Baltimore. 1982.
- Illuminated Manuscripts: Masterpieces in Miniature. The Walters Art Gallery, Baltimore. 1984-1985.
- To Hell and Back: Medieval Images of the Afterworld. The Walters Art Gallery, Baltimore. 1995.
- Checkmate! Medieval People at Play. The Walters Art Museum, Baltimore. 2010.
- The Saint Francis Missal. The Walters Art Museum, Baltimore. 2020.