Three Virtues (Temperance, Hope, and Fortitude or Justice) and Studies of a Seated Man, ca. 1420, Italian, Florence, Metalpoint, touches of brush and brown wash, heightened with white (partially oxidized in the figure at the lower left), on reddish violet prepared paper. Some lines retraced in pen and brown ink at a later date. , 9 13/16 x 7 5/16 in. (24. 9 x 18. 5 cm), Drawings, Circle of Lorenzo Monaco (Piero di Giovanni) (Italian, Florence (? ) ca. 1370?1425 Florence (? ) ), This rare metalpoint drawing has historically been attributed to the preeminent early fifteenth-century Florentine painter Lorenzo Monaco, and considered part of the album of drawings that belonged to the sixteenth-century biographer and artist, Giorgio Vasari