XBP340125: Scientific diagrams, from the 'Codex Leicester', 1508-12 (sepia ink on linen paper) (detail of 227790), Vinci, Leonardo da (1452-1519) / Private Collection / Bridgeman Images

ROC5863688: Verso: The surface anatomy of the shoulder, c.1510-11 (pen & ink on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

XCF307351: Study for a Fortress on a Polygonal Ground Plan with a Double Moat, fol. 116r from the Codex Atlanticus, 1504-8 (pen & Indian ink on paper), Vinci, Leonardo da (1452-1519) / Private Collection / Bridgeman Images

ROC5858103: The head of an old bearded man in profile, c.1519 (chalk on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

ROC5894051: Verso: Notes on reproduction, with sketches of a fetus in utero, etc., c.1511 (pen & ink on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

ROC700115: The stomach and related structures, c.1508 (pen & ink over chalk on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

ROC441166: Four studies of the musculature of the leg, c.1506-8 (pen & ink with black chalk on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

ROC5892734: Recto: The muscles and tendons of the sole of the foot, c.1510-11 (pen & ink over some stylus), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

ROC5617354: A study of seated figures in conversation, c.1480 (metalpoint on pink prepared paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

ROC5846286: Verso: The vessels of the liver, c.1508 (pen & ink on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

MEV5045213: Codex Atlanticus, sheet 24 recto, 1478-1518 (pen & ink), Vinci, Leonardo da (1452-1519) / Veneranda Biblioteca Ambrosiana, Milan, Italy / Bridgeman Images

MEV5045278: Codex Atlanticus, sheet 55 recto, 1478-1518 (pen & ink), Vinci, Leonardo da (1452-1519) / Veneranda Biblioteca Ambrosiana, Milan, Italy / Bridgeman Images

XJF308756: Studies for stables, Folio 39r, from Paris Manuscript B 2173, 1487-90 (pen & ink on paper), Vinci, Leonardo da (1452-1519) / Bibliotheque de l'Institut de France, Paris, France / Bridgeman Images

MEV5047032: Codex Atlanticus, sheet 920 recto, 1478-1518 (pen & ink), Vinci, Leonardo da (1452-1519) / Veneranda Biblioteca Ambrosiana, Milan, Italy / Bridgeman Images

MEV5045600: Codex Atlanticus, sheet 209 recto, 1478-1518 (pen & ink), Vinci, Leonardo da (1452-1519) / Veneranda Biblioteca Ambrosiana, Milan, Italy / Bridgeman Images

MEV5045472: Codex Atlanticus, sheet 145 recto, 1478-1518 (pen & ink), Vinci, Leonardo da (1452-1519) / Veneranda Biblioteca Ambrosiana, Milan, Italy / Bridgeman Images

MEV5045378: Codex Atlanticus, sheet 98 recto, 1478-1518 (pen & ink), Vinci, Leonardo da (1452-1519) / Veneranda Biblioteca Ambrosiana, Milan, Italy / Bridgeman Images

MEV5044311: Codex Atlanticus, sheet 77 verso, 1478-1518 (pen & ink), Vinci, Leonardo da (1452-1519) / Veneranda Biblioteca Ambrosiana, Milan, Italy / Bridgeman Images

ROC3823038: Recto: Studies of human proportion, c.1490 (pen & ink on paper) (recto of 3823039), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

ROC5907196: A branch of blackberry, and a stem of bird's-foot trefoil, c.1506-12 (red chalk on orange-red prepared paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

XCF282031: Study for the Virgin and Child, c.1478-1480 (ink and pencil on paper), Vinci, Leonardo da (1452-1519) / British Museum, London, UK / Bridgeman Images

GIA4744234: The pile of Alessandro (Alexander) Volta. Museum of Science and Technology, Milan., Volta, Alessandro (1745-1827) / Museo Nazionale della Scienza e della Tecnologia 'Leonardo Da Vinci', Milan, Italy / Bridgeman Images

ROC659963: A mould for casting the Sforza monument, decorative knots, and a note on the production of salt, c.1492-4 (pen & ink on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

MEV5045185: Codex Atlanticus, sheet 10 recto, 1478-1518 (pen & ink), Vinci, Leonardo da (1452-1519) / Veneranda Biblioteca Ambrosiana, Milan, Italy / Bridgeman Images

MEV5045217: Codex Atlanticus, sheet 26 recto, 1478-1518 (pen & ink), Vinci, Leonardo da (1452-1519) / Veneranda Biblioteca Ambrosiana, Milan, Italy / Bridgeman Images

MEV5045581: Codex Atlanticus, sheet 199 verso, 1478-1518 (pen & ink), Vinci, Leonardo da (1452-1519) / Veneranda Biblioteca Ambrosiana, Milan, Italy / Bridgeman Images

MEV5045290: Codex Atlanticus, sheet 61 recto, 1478-1518 (pen & ink), Vinci, Leonardo da (1452-1519) / Veneranda Biblioteca Ambrosiana, Milan, Italy / Bridgeman Images

MEV5045356: Codex Atlanticus, sheet 87 recto, 1478-1518 (pen & ink), Vinci, Leonardo da (1452-1519) / Veneranda Biblioteca Ambrosiana, Milan, Italy / Bridgeman Images

MEV5046337: Codex Atlanticus, sheet 577 verso, 1478-1518 (pen & ink), Vinci, Leonardo da (1452-1519) / Veneranda Biblioteca Ambrosiana, Milan, Italy / Bridgeman Images

MEV5046357: Codex Atlanticus, sheet 583 recto, 1478-1518 (pen & ink), Vinci, Leonardo da (1452-1519) / Veneranda Biblioteca Ambrosiana, Milan, Italy / Bridgeman Images

MEV5045391: Codex Atlanticus, sheet 104 verso, 1478-1518 (pen & ink), Vinci, Leonardo da (1452-1519) / Veneranda Biblioteca Ambrosiana, Milan, Italy / Bridgeman Images

MEV5047331: Codex Atlanticus, sheet 1069 verso, 1478-1518 (pen & ink), Vinci, Leonardo da (1452-1519) / Veneranda Biblioteca Ambrosiana, Milan, Italy / Bridgeman Images

MEV5046908: Codex Atlanticus, sheet 858 recto, 1478-1518 (pen & ink), Vinci, Leonardo da (1452-1519) / Veneranda Biblioteca Ambrosiana, Milan, Italy / Bridgeman Images

MEV5046912: Codex Atlanticus, sheet 860 recto, 1478-1518 (pen & ink), Vinci, Leonardo da (1452-1519) / Veneranda Biblioteca Ambrosiana, Milan, Italy / Bridgeman Images

ROC5892726: The anatomy of the leg, and other studies, c.1485-88 (pen & ink over metalpoint on pale blue prepared paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

XJF311636: Study with Shields for Foot Soldiers and an Exploding Bomb, c.1485-88 (pen and ink on paper), Vinci, Leonardo da (1452-1519) / Ecole Nationale Superieure des Beaux-Arts, Paris, France / Bridgeman Images