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

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

XOS3432851: Head of Virgin, 1508-1512 (black chalk, charcoal, and red chalk, with some traces of white chalk on card), Vinci, Leonardo da (1452-1519) / Metropolitan Museum of Art, New York, USA / Bridgeman Images

ROC427432: Study for an equestrian monument, c.1517-18 (chalk on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

ROC427435: Job's tears, c.1510 (pen & ink over chalk on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

IMO2070794: The Last Supper, 1495-97 (fresco), Vinci, Leonardo da (1452-1519) / Museo del Cenacolo Vinciano, Santa Maria delle Grazie (Museum of the Last Supper), Milan, Italy / Bridgeman Images

ROC399270: The muscles of the leg and the intercostal muscles, c.1510 (pen & ink over black chalk on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

ROC3899942: Verso: The foetal blood supply of the cow, c.1508 (pen & ink on paper) (verso of 3899941), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

MEV5045460: Codex Atlanticus, sheet 139 recto, 1478-1518 (pen & ink), Vinci, Leonardo da (1452-1519) / Veneranda Biblioteca Ambrosiana, Milan, Italy / Bridgeman Images

XJF311686: Fol.145v-b, page from Da Vinci's notebook (pen & ink on paper), Vinci, Leonardo da (1452-1519) / British Museum, London, UK / Bridgeman Images

ROC700110: The brachial plexus, c.1508 (pen & ink over chalk on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

ROC5892743: Verso: The mechanics of the arm in man and monkey, c.1508 (pen & ink over black chalk on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

ROC5455483: The heart compared to a seed, c.1508 (pen & ink and chalk on paper) (recto of 5455484), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

XIR159289: Study of an Angel (chalk on paper) (b/w photo), Vinci, Leonardo da (1452-1519) (attr.to) / Ecole Nationale Superieure des Beaux-Arts, Paris, France / Bridgeman Images

ROC443652: A portrait of Leonardo, a head of a man, and horse' fore-leg, c.1517-18 (pen & ink over chalk on paper), Vinci, Leonardo da (1452-1519) (studio of) / Royal Collection Trust / Bridgeman Images

XOT405720: The Baptism of Christ by John the Baptist, c.1475 (oil on panel) (detail of 362326), Verrocchio, Andrea (1435-88) & Vinci, Leonardo da(1452-1519) / Gallerie degli Uffizi, Florence, Tuscany, Italy / Bridgeman Images

MEV5045393: Codex Atlanticus, sheet 105 verso, 1478-1518 (pen & ink), Vinci, Leonardo da (1452-1519) / Veneranda Biblioteca Ambrosiana, Milan, Italy / Bridgeman Images

MEV5046125: Codex Atlanticus, sheet 471 verso, 1478-1518 (pen & ink), Vinci, Leonardo da (1452-1519) / Veneranda Biblioteca Ambrosiana, Milan, Italy / Bridgeman Images

ROC3823042: Recto: The proportions of the arm, c.1490 (pen & ink on paper) (recto of 3823043), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

ROC5892737: Verso: The muscles of the trunk and leg, c.1510-11 (black chalk, pen and ink, wash on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

ROC5892749: Verso: The brachial plexus and nerves of the arm, c.1508 (pen & ink over black chalk on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

ROC5669154: A satire on aged lovers, c.1490 (leadpoint, pen & pale ink on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

ROC5669158: Recto: The veins of the face, and a torso, 1489 (pen & ink on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

ROC5894042: Verso: Studies of the nervous system, c.1485-90 (metalpoint (faded) and pen and ink on blue-grey prepared paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

ROC5863690: Recto: The muscles of the back and arm, c.1508 (pen & ink over chalk on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

XKH179072: Caricature Head Study of an Old Man, c.1500-05 (red chalk on paper), Vinci, Leonardo da (1452-1519) / Hamburger Kunsthalle, Hamburg, Germany / Bridgeman Images

BIF267170: Architectural sketch for an 'Ideal City', fol. 16 (recto) from Paris Manuscript B, 1488-90 (pen and ink on paper), Vinci, Leonardo da (1452-1519) / Bibliotheque de l'Institut de France, Paris, France / Bridgeman Images

ROC700105: A bear's foot, c.1488-90 (metalpoint and pen & ink with white heightening on blue paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

BAT58331: Drapery Study for a Standing Figure Seen from the Front, c.1478-80 (tempera and white on canvas), Vinci, Leonardo da (1452-1519) / Gabinetto dei Disegni e Stampe, Galleria Degli Uffizi, Florence, Tuscany, Italy / Bridgeman Images

ROC5614245: The head and shoulders of a young man wearing a cap in profile, c.1480-85 (pen & ink on paper) (recto of 5614246), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

MEV5045416: Codex Atlanticus, sheet 117 recto, 1478-1518 (pen & ink), Vinci, Leonardo da (1452-1519) / Veneranda Biblioteca Ambrosiana, Milan, Italy / Bridgeman Images

RTR5315908: Birds Flight Code, c. 1505-06, paper manuscript, cc. 18, sheet 6 recto, Vinci, Leonardo da (1452-1519) / Biblioteca Reale, Musei Reali, Turin, Piedmont, Italy / Bridgeman Images

RTR5315912: Birds Flight Code, c. 1505-06, paper manuscript, cc. 18, sheet 8 recto, Vinci, Leonardo da (1452-1519) / Biblioteca Reale, Musei Reali, Turin, Piedmont, Italy / Bridgeman Images

ROC5907197: A sprig of guilder-rose, c.1506-12 (red chalk, touches of white chalk, on orange-red prepared paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

ROC5892744: Recto: The muscles and nerves of the leg, c.1508 (pen & ink over black chalk on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images