Venetian Sailing Directions. Drawings of zodiacs, hands, and divisions of time in Nicolo Stolfo. [Early Venetian Sailing Directions in the Mediterranean Sea] Manuscript. [Venice,] August 1499. Rare Book and Special Collections Division, Library of Congress
Source: Portrait by the Florentine painter Ridolfo Ghirlandaio (1483-1561). National Geographic, Vol. 148, No. 5 (November 1975), pp. 618-619.