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
GIM5037941: Two man profiles, an old man and a young man. The young man represents Gian Giacomo Caprotti, known as Andrea Salai or Salaij (circa 1480-1524), Leonard's pupil and lover. Drawing a la sanguine by Leonardo da Vinci (Leonard de Vinci) (1452-1519) Florence, Galleria degli Uffizi (Offices), Vinci, Leonardo da (1452-1519) / Bridgeman Images