"Lucia di Simone Robbia". Catholic Encyclopedia. New York: Robert Appleton Company. ↑ A History of Art for Beginners and Students by Clara Erskine Clement Waters, pg 220 ↑ Italian and Spanish Sculpture by Peggy Anne Fogelman and Peter Fusco, pgs 344-350 ↑ Collection of Mediaeval And Renaissance Paintings by Fogg Art Museum, pgs 156-158 ↑ Claudio Rendina, Enciclopedia di Roma, Newton Compton, Rome. ↑ Rome edited by Marcia B. Hall, pgs 64-65 and 83 ↑ High Renaissance Art in St. Peter's and the Vatican by George L. Hersey, pg 36 ↑ Blumenthal, Arthur R. (2001).