RTR5315909: Birds Flight Code, c. 1505-06, paper manuscript, cc. 18, sheet 6 verso, Vinci, Leonardo da (1452-1519) / Biblioteca Reale, Musei Reali, Turin, Piedmont, Italy / Bridgeman Images

RTR5315917: Birds Flight Code, c. 1505-06, paper manuscript, cc. 18, sheet 10 verso, Vinci, Leonardo da (1452-1519) / Biblioteca Reale, Musei Reali, Turin, Piedmont, Italy / Bridgeman Images

RTR5315922: Birds Flight Code, c. 1505-06, paper manuscript, cc. 18, sheet 13 recto, Vinci, Leonardo da (1452-1519) / Biblioteca Reale, Musei Reali, Turin, Piedmont, Italy / Bridgeman Images

RTR5315940: Birds Flight Code, c. 1505-06, paper manuscript, cc. 18, sheet 2 recto, Vinci, Leonardo da (1452-1519) / Biblioteca Reale, Musei Reali, Turin, Piedmont, Italy / Bridgeman Images

IBE5352607: Portrait of Leonardo da Vinci, Altissimo, Cristofano dell' (c.1525-1605) / Gallerie degli Uffizi, Florence, Tuscany, Italy / Bridgeman Images

FAF3565878: Bust of a man in profile, drawing by Leonardo da Vinci. Gabinetto dei Disegni e delle Stampe, Uffizi Gallery, Florence, Vinci, Leonardo da (1452-1519) / Gabinetto dei Disegni e Stampe, Galleria Degli Uffizi, Florence, Tuscany, Italy / Bridgeman Images

XJF308768: Fol. 34r from Manuscript E, 1513-14 (pen & ink on paper), Vinci, Leonardo da (1452-1519) / Bibliotheque de l'Institut de France, Paris, France / Bridgeman Images

RTR5315923: Birds Flight Code, c. 1505-06, paper manuscript, cc. 18, sheet 13 verso, Vinci, Leonardo da (1452-1519) / Biblioteca Reale, Musei Reali, Turin, Piedmont, Italy / Bridgeman Images

RTR5315925: Birds Flight Code, c. 1505-06, paper manuscript, cc. 18, sheet 14 verso, Vinci, Leonardo da (1452-1519) / Biblioteca Reale, Musei Reali, Turin, Piedmont, Italy / Bridgeman Images

RTR5315929: Birds Flight Code, c. 1505-06, paper manuscript, cc. 18, sheet 16 verso, Vinci, Leonardo da (1452-1519) / Biblioteca Reale, Musei Reali, Turin, Piedmont, Italy / Bridgeman Images

RTR5315931: Birds Flight Code, c. 1505-06, paper manuscript, cc. 18, sheet 17 verso, Vinci, Leonardo da (1452-1519) / Biblioteca Reale, Musei Reali, Turin, Piedmont, Italy / Bridgeman Images

RTR5315938: Birds Flight Code, c. 1505-06, paper manuscript, cc. 18, sheet 1 recto, Vinci, Leonardo da (1452-1519) / Biblioteca Reale, Musei Reali, Turin, Piedmont, Italy / Bridgeman Images

ROC3956006: Notes on the death of a centenarian, c.1508 (pen and ink over traces of black chalk), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

XIR72089: Head of a beardless old man, left profile (red chalk on paper), Vinci, Leonardo da (1452-1519) / Musee Bonnat, Bayonne, France / Bridgeman Images

ROC5648233: The heart, lungs and other organs (verso) c.1508 (pen and ink over black chalk), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

MEP5337462: The Annunciation, c.1475 (oil and tempera on wood), Vinci, Leonardo da (1452-1519) / Gallerie degli Uffizi, Florence, Tuscany, Italy / Bridgeman Images

CHT247795: Design for a canal Lock, 1607 (woodcut), Zonca, Vittorio (1568-1602) / Bibliotheque des Arts Decoratifs, Paris, France / Bridgeman Images

XJF311687: Figural Studies for the Adoration of the Magi, c.1481 (pen and ink on paper), Vinci, Leonardo da (1452-1519) / Wallraf Richartz Museum, Cologne, Germany / Bridgeman Images

ROC483496: The head of a man wearing a plumed headdress in profile, c.1496 (pen & ink on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images

COU5934467: Studies for Saint Mary Magdalene, c.1480-82 circa (pen & brown ink on paper; later framing line in pencil, partially trimmed), Vinci, Leonardo da (1452-1519) / The Courtauld, London (Samuel Courtauld Trust) / Bridgeman Images

MEV5044328: Saint John the Baptist, 1510-20 (tempera & oil on panel), Caprotti, Gian Giacomo (c.1480-c.1524) (attr. to) / Pinacoteca Ambrosiana, Milan, Italy / Bridgeman Images

CH425889: Madonna of the Yarnwinder (oil on canvas), Vinci, Leonardo da (1452-1519) (manner of) / Private Collection / Bridgeman Images

WGL2562898: The Forerunner, 1920 (oil on canvas), Fortescue-Brickdale, Eleanor (1871-1945) / Lady Lever Art Gallery, National Museums Liverpool / Bridgeman Images

FAF3566083: Senile male portrait; drawing by Leonardo da Vinci. The Louvre, Paris, Vinci, Leonardo da (1452-1519) / Louvre, Paris, France / Bridgeman Images

FAF3565985: Woman's face, drawing by Leonardo da Vinci. Gallerie dell'Accademia, Venice, Vinci, Leonardo da (1452-1519) / Gallerie dell'Accademia, Venice, Italy / Bridgeman Images

CPH256974: Page from a notebook with technical designs and notes (sepia ink on linen paper), Vinci, Leonardo da (1452-1519) / Gallerie dell'Accademia, Venice, Italy / Bridgeman Images

FAF3566084: Female portrait; drawing by Leonardo da Vinci. The Louvre, Paris, Vinci, Leonardo da (1452-1519) / Louvre, Paris, France / Bridgeman Images

TRK4898332: Portrait of Leonardo da Vinci (1452-1519) (Leonardo da Vinci)., Fonollosa, Francisco (d.c.1998) / Private Collection / Bridgeman Images

GIA4811194: Model of Leonardo da Vinci's Glider (Leonardo da Vinci) - Museum of Science and Techniques of Leonardo da Vinci, in Milan, Vinci, Leonardo da (1452-1519) (after) / Museo Nazionale della Scienza e della Tecnologia 'Leonardo Da Vinci', Milan, Italy / Bridgeman Images

LAL957453: Michelangelo did not like Leonardo da Vinci (colour litho), English School, (20th century) / Private Collection / Bridgeman Images

TRK879439: Studies on the moon. Leonardo da Vinci is interested in the phenomenon of light reflection from one planet to another. / Museo Nazionale della Scienza e della Tecnologia 'Leonardo Da Vinci', Milan, Italy / Bridgeman Images

FAF3565885: Drapery study, drawing by Leonardo da Vinci, Cabinet of Drawings and Prints, Uffizi Gallery, Florence, Vinci, Leonardo da (1452-1519) / Gabinetto dei Disegni e Stampe, Galleria Degli Uffizi, Florence, Tuscany, Italy / Bridgeman Images

FAF3566022: Seven grotesque heads; drawing by Leonardo da Vinci. Gallerie dell'Accademia, Venice, Vinci, Leonardo da (1452-1519) / Gallerie dell'Accademia, Venice, Italy / Bridgeman Images

CTS5888719: Grotesque head (pen & ink on paper), Vinci, Leonardo da (1452-1519) / The Devonshire Collections, Chatsworth / Bridgeman Images

CTS5888721: A caricature (pen & ink on paper), Vinci, Leonardo da (1452-1519) / The Devonshire Collections, Chatsworth / Bridgeman Images

ROC700100: Notes on necromancy and alchemy, c.1508 (pen & ink on paper), Vinci, Leonardo da (1452-1519) / Royal Collection Trust / Bridgeman Images