See Vol. I., Age of the Despots, pp. 296-298. Vol. II., Revival of Learning, pp. 161-166. For his architectural designs see his Life, by Manetti, book ii., in Muratori, vol. iii. part ii.
Gregorovius, vol. vii. p. 638.
Besides the great work of Bonanni, Templi Vaticani Historia, I may refer my readers to the atlas volume of Illustrations, Architectural and Pictorial, of the Genius of Michael Angelo Buonarroti, compiled by Mr. Harford (Colnaghi, 1857). Plates 1 to 7 of that work are devoted to the plans of S. Peter's. Plate 4 is specially interesting, since it represents in one view the old basilica and the design of Bramante, together with those of Antonio di S. Gallo and Michael Angelo.