Jacob Burckhardt, Die Cultur der Renaissance in Italien.
Dr. W. Bode, Dr. Müller-Walde, Jahrbuch der K. Preuss. Kunstsammlungen. Vols. ix., x., and xviii.
K. Kindt, Die Katastrophe Lodovico Moro in Novara.
Dr. Müller-Walde, Leonardo da Vinci.
English.
History of the Papacy, by Dr. Creighton, Bishop of London. Vols. iv. and v.
The End of the Middle Ages, by Madame James Darmetester.
The Renaissance in Italy. J. A. Symonds.
Old Touraine. T. Cook