ROC427440: Neptune, c.1504-05 (chalk on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

ROC478414: Studies of geometry, clouds, plants, engineering, c.1490 (pen & ink on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

FTB165452: Study of a hand (red chalk on paper), Vinci, Leonardo da (1452-1519) / Gallerie dell'Accademia, Venice, Italy / Bridgeman Images

ROC478430: The bones, muscles and tendons of the hand, c.1510 (pen & ink with wash over black chalk on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

FTB165449: War machine (pencil on paper), Vinci, Leonardo da (1452-1519) / Gallerie dell'Accademia, Venice, Italy / Bridgeman Images

ROC399217: Mortars bombing a fortress, c.1503-04 (pen & ink, wash and chalk on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

CH2633472: Colored Mona Lisa, 1963 (silkscreen inks & graphite on canvas), Warhol, Andy (1928-87) / Private Collection / Bridgeman Images

JLJ4607245: Francois 1st King of France received the painting of the Holy Family at Fontainebleau, 1814 (oil on canvas), Lemonnier, Anicet-Charles (1743-1824) / Musee des Beaux-Arts, Rouen, France / Bridgeman Images

ROC408313: A scene in an arsenal, c.1485-90 (pen & ink over black chalk on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

ROC2628782: A Deluge, c.1517-18 (black chalk on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

ROC399247: Head of St. Anne, c.1510-15 (chalk on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

BEN140571: Angel Gabriel, from the Annunciation, 1472-75 (oil on panel) (detail) (post-restoration), Vinci, Leonardo da (1452-1519) / Gallerie degli Uffizi, Florence, Tuscany, Italy / Bridgeman Images

ROC399240: Two grotesque profiles confronted, c.1485-90 (pen & ink and wash on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

XJF311632: Studies of Violas (Viola odorata and Viola canina), fol. 14r from Manuscript B, c.1487-90 (pen and ink on paper), Vinci, Leonardo da (1452-1519) / Bibliotheque de l'Institut de France, Paris, France / Bridgeman Images

ROC493256: A Deluge, c.1517 (black chalk on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

XJL62083: Sketch of the Casting Pit for the Sforza Horse seen from above and the side, fol. 149r from the Codex Madrid I, c.1493 (pen & ink on paper), Vinci, Leonardo da (1452-1519) / Biblioteca Nacional, Madrid, Spain / Bridgeman Images

XJF311630: Preparatory drawing for the Last Supper (sepia ink on linen paper), Vinci, Leonardo da (1452-1519) / Gallerie dell'Accademia, Venice, Italy / Bridgeman Images

ROC399237: An outcrop of stratified rock, c.1510 (pen & ink and chalk on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

ROC399227: Sketches for the Trivulzio monument, c.1508-10 (pen & ink on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

MEV5046815: Codex Atlanticus, sheet 812 recto, 1478-1518 (pen & ink), Vinci, Leonardo da (1452-1519) / Veneranda Biblioteca Ambrosiana, Milan, Italy / Bridgeman Images

FAB32565: Studies of the Proportions of the Face and Eye, 1489-90 (pen & ink over metalpoint on paper), Vinci, Leonardo da (1452-1519) / Biblioteca Nazionale, Turin, Italy / Bridgeman Images

FTB104421: Five Studies of Grotesque Faces (red chalk on paper), Vinci, Leonardo da (1452-1519) (attr.to) / Gallerie dell'Accademia, Venice, Italy / Bridgeman Images

XJF311696: Studies for the heads of two soldiers in 'The Battle of Anghiari', c.1504-05 (black chalk or charcoal on paper), Vinci, Leonardo da (1452-1519) / Museum of Fine Arts (Szepmuveszeti) Budapest, Hungary / Bridgeman Images

ROC478432: The vessels of the liver, c.1508 (pen & ink on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

ROC427442: A standing masquerader, c.1517-18 (chalk, pen & ink and wash on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

ROC430744: The anatomy of a male nude, and a battle scene, c.1504-06 (red chalk with pen & ink on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

FTB60399: Study of Horsemen in Combat and Foot Soldiers, 1503 (pen & ink on paper), Vinci, Leonardo da (1452-1519) / Gallerie dell'Accademia, Venice, Italy / Bridgeman Images

ROC399264: The superficial anatomy of the shoulder and neck, c.1510 (pen & ink with wash over black chalk on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

ROC478427: A sheet of pictographs drawn over astronomical studies, c.1487 (pen & ink on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

FTB61700: Study of Horsemen in Combat and Foot Soldiers, 1503 (pen and ink on paper), Vinci, Leonardo da (1452-1519) / Gallerie dell'Accademia, Venice, Italy / Bridgeman Images

ROC478416: Two willow trees, c.1512 (pen & ink on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

XLA3771187: The Last Supper -New Testament, Vinci, Leonardo da (1452-1519) (after) / Bridgeman Images

FAB62356: Study for the Infant Christ, c.1501-10 (red chalk on paper), Vinci, Leonardo da (1452-1519) / Gallerie dell'Accademia, Venice, Italy / Bridgeman Images

XJF308754: MS B 2173, folio 74v: Study for a flying machine, 1487-1490 (pen & ink on paper), Vinci, Leonardo da (1452-1519) / Bibliotheque de l'Institut de France, Paris, France / Bridgeman Images

ROC478423: Studies of figures in action, c.1508 (black chalk with pen & ink on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

ROC399232: Sketches of dragons, c.1478-80 (pen & ink, chalk and stylus on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images