Exhibitions
- Undercover Stories in Art. The Walters Art Gallery, Baltimore. 1980.
- Illuminated Manuscripts: Masterpieces in Miniature. The Walters Art Gallery, Baltimore. 1984-1985.
- Saints and Their Symbols. The Walters Art Gallery, Baltimore. 1985-1986.
- Puer Natus Est : The Christmas Story in Medieval Manuscripts. The Walters Art Gallery, Baltimore. 1986-1987.
- Real People in the Middle Ages: Donor Portraits in Illuminated Manuscripts. The Walters Art Gallery, Baltimore. 1987.
- Death and Dying in the Middle Ages. The Walters Art Gallery, Baltimore. 1987.
- Making Music in Medieval Manuscripts. The Walters Art Gallery, Baltimore. 1988-1989.
- Medieval Mastery, Book Illumination from Charlemagne to Charles the Bold (Meesterlijke Middeleeuwen). Stedelijik Museum Vander Kelen-Mertens, Leuven. 2002.
- Hearst the Collector. Los Angeles County Museum of Art, Los Angeles. 2008-2009.
- The Christmas Story: Picturing the Birth of Christ in Medieval Manuscripts. The Walters Art Museum, Baltimore. 2009-2010.
