Codex on the Flight of Birds (Codice sul volo degli uccelli), by Leonardo da Vinci, c. 1505, 16th Century, manuscript on paper, 15,4 x 21,3 cm. Italy, Piedmont, Turin, Biblioteca Reale di Torino. Detail. A page from the Codex on the Flight of Birds.
Codex on the Flight of Birds (Codice sul volo degli uccelli), by Leonardo da Vinci, c. 1505, 16th Century, manuscript on paper, 15,4 x 21,3 cm. Italy, Piedmont, Turin, Biblioteca Reale di Torino. Detail. A page from the Codex on the Flight of Birds.