Scanned from 35mm slide in UofL VRC collection. Original source : Gardner's Art Through the Ages. [?]th ed. Cataloging info transcribed from: Kleiner, Fred S., and Christin J. Mamiya. Gardner's Art Through the Ages. 12th ed. Belmont, CA: Thomson/Wadsworth, 2005. (Corresponds to fig.16-19, p.435 in 12th ed.)
Photo/illustration credit/reproduced in Kleiner courtesy: Stiftsbibliothek, Saint Gall.