Design Fragment for the Left Side of the 'Fonte Gaia' in Siena, 1415?16, Pen and brown ink, brush and brown wash, over traces of leadpoint and ruling, on vellum, glued onto secondary paper support, 7-13/16 x 8-7/16 in. (20. 1 x 21. 4 cm), Drawings, Jacopo della Quercia (Jacopo di Pietro d?Angelo di Guarnieri) (Italian, Siena 1374? ?1438 Siena), This is one of the most historically important early Italian drawings in a United States collection, and is associated with a famous sculptural project in Renaissance Italy. The details of the project are complex but illuminate the crucial role of this drawing in the development of the commission