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Homo ad circulum
Homo ad circulum, drawing by Leonardo da Vinci, after Vitruvius, pen and ink on paper, 343×245 mm, 1485/90 (Venice, Galleria dell’Accademia); photo credit: Alinari/Art Resource, NY
Rule-of-thumb precepts of proportion from the portfolio of Villard de Honnecourt, parchmen....
Rule-of-thumb precepts of proportion from the portfolio of Villard de Honnecourt, parchment, 1220–35 (Paris, Bibliothèque Nationale); photo credit: Giraudon/Art Resource, NY
