Much of my research has been on the Veronese/Venetian architect Michele Sanmicheli, on whom I co-authored a major monograph (2004). I have also co-authored an extensive catalogue of the architectural drawings, mainly of the sixteenth and early seventeenth centuries, which formed part of the enormous collection of the antiquarian Cassiano dal Pozzo and are now mostly in the Royal Collection (to be published in 2012). In addition, I work on sixteenth-century architectural theory, looking particularly at sixteenth-century Italian architects (Raphael, Giulio Romano, etc.), and in recent years I have been focusing particularly on Michelangelo and his architecture in both Florence and Rome, which will be the subject of a forthcoming book. I continue to take, as well, a keen interest in the Barber Institute collections.