Leonard Boyle, O.P. IV and the Vatican Library,” “Sixtus Rome: Tradition, Innovation and (conference Rome 1984), Victoria, B.C., 1991, pp. 65-73. Renewal Nicholas Clark, London, 1990 Melozzo da Forlì: Pictor Papalis, Marcia Hall, V: A Program for the Decorum of Images,” LXXXVI, 1998, “Sixtus Arte Cristiana, pp. 41-48
Leonard Boyle, O.P. “Sixtus IV and the Vatican Library,” Rome: Tradition, Innovation and Renewal (conference Rome 1984), Victoria, B.C., 1991, pp. 65-73. Nicholas Clark, Melozzo da Forlì: Pictor Papalis, London, 1990 Marcia Hall, “Sixtus V: A Program for the Decorum of Images,” Arte Cristiana, LXXXVI, 1998, pp. 41-48