MEV5047609: De divina proportione, Figure XL, sheet 111 recto: Empty body with seventy-two bases, Septvaginta dvarvm basivm vacvvm, Vinci, Leonardo da (1452-1519) (attr.to) / Veneranda Biblioteca Ambrosiana, Milan, Italy / Bridgeman Images

STC740411: Icosaedron elevatum vacuum, illustration from 'Divina Proportione' by Luca Pacioli (c.1445-1517), originally pub. Venice, 1509 (litho), Vinci, Leonardo da (1452-1519) (attr.to) / Private Collection / Bridgeman Images

AII143388: Detail of the Dragon from the drawing Fight between a Dragon and a Lion (brown ink with wash on paper), Vinci, Leonardo da (1452-1519) (school of) / Gabinetto dei Disegni e Stampe, Galleria Degli Uffizi, Florence, Tuscany, Italy / Bridgeman Images

XOS3959941: Saint John the Baptist, 1505-07 (oil on poplar wood), Vinci, Leonardo da (1452-1519) (studio of) / Kunstmuseum, Basel, Switzerland / Bridgeman Images

ROC437758: St. John the Baptist, c.1485 (metalpoint with white heightening on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

ROC3823040: Recto: Studies of human proportion, c.1490 (pen & ink on paper) (recto of 3823041), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

ROC3823041: Verso: Studies of human proportion, c.1490 (pen & ink on paper) (verso of 3823040), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

ROC5676222: Recto: Studies for casting apparatus, and miscellaneous notes, c.1492-93 (pen & ink and chalk on paper) (recto of 5676223), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

MEV5047332: Codex Atlanticus, sheet 1070 recto, 1478-1518 (pen & ink), Vinci, Leonardo da (1452-1519) / Veneranda Biblioteca Ambrosiana, Milan, Italy / Bridgeman Images

MEV5047387: Codex Atlanticus, sheet 1097 recto, 1478-1518 (pen & ink), Vinci, Leonardo da (1452-1519) / Veneranda Biblioteca Ambrosiana, Milan, Italy / Bridgeman Images

ROC478418: The head of a man with a diagram in place of the eye, c.1513 (pen & ink on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

ROC3090465: A bird's-eye view of the Valdichiana, c.1503-04 (charcoal, pen & ink with wash on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

ROC5674281: The hands of St John in the Last Supper, c.1495 (chalk on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

CH376612: The Codex Hammer or Codex Leicester, 1508-12 (sepia ink on linen paper), Vinci, Leonardo da (1452-1519) / Private Collection / Bridgeman Images

ROC692842: Studies for an equestrian monument, c.1517 (black chalk on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

ROC5617343: A deluge, c.1517-18, (chalk on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

ROC5892753: Recto: The bladder, c.1508 (traces of black chalk, pen and ink on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

ROC5669155: A bust of a child from the front and back, c.1500 (chalk on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

ROC3931872: A standing masquerader, c.1517-18 (black chalk, pen & ink and wash on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

ROC5892735: Verso: The muscles of the lower leg, c.1510-11 (pen and ink over traces of black chalk on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

MEV5045496: Codex Atlanticus, sheet 157 recto, 1478-1518 (pen & ink), Vinci, Leonardo da (1452-1519) / Veneranda Biblioteca Ambrosiana, Milan, Italy / Bridgeman Images

XJF311215: Study of a man blowing a trumpet in another's ear, and two figures in conversation, c.1480-82 (pen and ink on paper), Vinci, Leonardo da (1452-1519) / British Museum, London, UK / Bridgeman Images

XJF311217: Battle between a Rider and a Dragon, c.1482 (stylus underdrawing, pen and brush on paper), Vinci, Leonardo da (1452-1519) / British Museum, London, UK / Bridgeman Images

ROC489435: The Leg Sectioned, c.1485 (pen & ink over metalpoint on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

ROC437790: The principal organs and vessels of a woman, c.1510 (pen & ink on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

ROC412170: Studies of flowing water, c.1510-13 (pen & ink on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

ROC5674283: Recto: The torso and leg of a nude man in profile, and a study of machinery, c.1488-90 (pen & ink over traces of black chalk on paper) (recto of 5674284), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

MEV5045306: Codex Atlanticus, sheet 69 recto, 1478-1518 (pen & ink), Vinci, Leonardo da (1452-1519) / Veneranda Biblioteca Ambrosiana, Milan, Italy / Bridgeman Images

MEV5046882: Codex Atlanticus, sheet 845 recto, 1478-1518 (pen & ink), Vinci, Leonardo da (1452-1519) / Veneranda Biblioteca Ambrosiana, Milan, Italy / Bridgeman Images

MEV5046685: Codex Atlanticus, sheet 747 recto, 1478-1518 (pen & ink), Vinci, Leonardo da (1452-1519) / Veneranda Biblioteca Ambrosiana, Milan, Italy / Bridgeman Images

MEV5047357: Codex Atlanticus, sheet 1082 recto, 1478-1518 (pen & ink), Vinci, Leonardo da (1452-1519) / Veneranda Biblioteca Ambrosiana, Milan, Italy / Bridgeman Images

MEV5045710: Codex Atlanticus, sheet 264 recto, 1478-1518 (pen & ink), Vinci, Leonardo da (1452-1519) / Veneranda Biblioteca Ambrosiana, Milan, Italy / Bridgeman Images

XBP341805: A page from the Codex Leicester, 1508-12 (sepia ink on linen paper), Vinci, Leonardo da (1452-1519) / Private Collection / Bridgeman Images

LRI4635228: Geometry: “” An Icosahedron”” Page taken from the manuscript “” De divina proportione”” (On divine proportions) by mathematician Fra Luca Pacioli dit Luca di Borgo (1445-1517) illustrated by Leonardo da Vinci (1452-1519).1509., Vinci, Leonardo da (1452-1519) / Private Collection / Bridgeman Images

ROC5892725: Six studies of the bones and muscles of the arm, c.1508-10 (pen & ink on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

ROC5455482: The bone and vessels of the thigh, c.1508-10 (pen & ink and chalk on paper) (verso of 5455481), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images