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- The Nativity in Medieval and Renaissance Manuscripts. The Walters Art Gallery, Baltimore. 1987-1988.
- Treasures in Heaven: Armenian Illuminated Manuscripts. The Morgan Library & Museum, New York; The Walters Art Gallery, Baltimore. 1994.
- The Christmas Story: Picturing the Birth of Christ in Medieval Manuscripts. The Walters Art Museum, Baltimore. 2009-2010.