text: His major works are "Per la Storia Della Prospettiva 1405 - 1605" Rome, 1978; "Borromini a quattro Dimensioni" Florence, 1981; "A history of the perspective scene from Renaissance to Baroque", Cadmo-Casalini, Florence, 2000;"A voyage into baroque spectacle. The Gallery in Palazzo Spada" Rome, 2001; "Verso una storia organica della prospettiva", Kappa, Rome, 2001; "Leonardo and the Divine Proportion" Florence, 2007; "On painting. A New Translation and Critical Edition" Cambridge University Press which will be released in March 2011.