c. 1526
Pen, drypoint and sanguine; diameter 21,4 cm
Florence, Gabinetto Disegni e Stampe degli Uffizi, 773 A r
This drawing is part of a group of 4 folios witnessing the surveying campaign of the Florentine walls carried out by Antonio da Sangallo the Younger for Clement VII not long before the siege of 1530.