LEONARDO da Vinci
(b. 1452, Vinci, d. 1519, Cloux, near Amboise)
Canal bridgec. 1495
Pen and ink on paper, 27 x 20 cm
Biblioteca Ambrosiana, Milan
On this sheet (Codex Atlanticus, fol. 126v) Leonardo designed a canal bridge crossing over a second water course flowing beneath it. A lock would be used to enable a ship to pass from one to the other despite the height difference.