This book represents a contribution of the highest value to our knowledge of art and the artistic imagination at a critical moment in its history, the culmination of the long Renaissance tradition of thematic invention and variation. --David Rosand, Meyer Schapiro Professor of Art History, Columbia University A landmark in the history of art. --John W. O'Malley, S.J., Weston Jesuit School of Theology Gealt and Knox have undertaken an investigatory...