Labels:text | letter | paper | ink OCR: Proportional Study of Man in the Manner of Vitruvius ca. 1487, pen and ink 13 V2 × 95/e in. (34.3 x 24.5 cm) Venice, Accademia 228 Renaissance architects were profoundly affected by the architectural writings of Vitruvius, dating from the 1st century B.C. Particularly influential was his theory of proportion based on the human body, in which the most perfect shapes could be found: the circle and the square. Leonardo's famous drawing works a variation on this passage from Vitruvius: "If a man be placed flat on his back, with hands and feet extended, and a pair of compasses centered at his navel, the fingers and toes of his two hands and feet will touch the circumfer- ence of the circle described therefrom. And just as the human body yields a circular outline, so too it yields a square figure." 210
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