Exhibitions
- Puer Natus Est : The Christmas Story in Medieval Manuscripts. The Walters Art Gallery, Baltimore. 1986-1987.
- Time Sanctified: The Book of Hours in Medieval Art and Life. The Walters Art Gallery, Baltimore. 1988.
- Plants and Flowers in Medieval Manuscripts. The Walters Art Gallery, Baltimore. 1991.
- Prayers in Code: Books of Hours from Renaissance France. The Walters Art Museum, Baltimore. 2009.