Palazzo Piccolomini, Siena; possibly Guiseppe Grassi, Rome or possibly Livio Odescalchi (1652-1713), Rome; Pierto Stettiner, Rome; Principe del Drago, Rome; Avv. Lodovico Rosselli, Rome; possibly Voltera and Forti; Dedalo Gallery, New York, New York, May 12,1952 [as Guido da Siena]; Samuel H. Kress Foundation, New York, New York, 1961