Exhibitions
- Early Christian and Byzantine Art. Baltimore Museum of Art, Baltimore. 1947.
- Medieval Art, 1060-1550. University Art Gallery, South Bend. 1974.
- Splendor in Books. Grolier Club, New York; The Walters Art Gallery, Baltimore. 1977-1978.
- Illuminated Manuscripts: Masterpieces in Miniature. The Walters Art Gallery, Baltimore. 1984-1985.
- Treasures in Heaven: Armenian Manuscript Illumination. The Walters Art Gallery, Baltimore. 1988.
- Byzantium: Faith and Power (1261-1557). The Metropolitan Museum of Art, New York. 2004.