1. See, e.g., the discussion by Jonathan J. G. Alexander, “Facsimiles, Copies and Variations: The Relationship to the Model in Medieval and Renaissance Illuminated Manuscripts,” inRetaining the Original: Multiple Originals, Copies and Reproductions(Studies in the History of Art, Vol. 20) (Washington, DC, 1989), 62
2. I refer here specifically to the floor plans and elevations of Sainte-Foi, Conques, Saint-Sernin, Toulouse, and Santiago de Compostela
3. See, e.g., Alexander, “Facimilies, Copies and Variations,” 63: “In regard to copying, each text implies an exemplar, going back ultimately to the author's archetype. The task of the scribe was to copy accurately.”