Alinari/Art Resources, NY; Bulloz, Paris, France;
Bernard S. Myers and Trewin Coppleston, eds. Art
Anne Munchow, Germany; Photographie Giraudon/Art
Resource, NY; Scala, Florence, Italy; Stadsbildstele,
Aachen, Germany.
REFERENCES
Friedrich Heer. Charlemagne and his World. New York:
Macmillan Publishing Co. Inc., 1975
Treasures in Germany, 1970 and Art Treasures in France,1969.
New York: McGraw-Hill Book Company