Author: Leonardo da Vinci

Crossbow Machine, 1481, Leonardo Da Vinci

Medium: ink,paper

Head of Christ, 1495, Leonardo Da Vinci

Medium: pencil,wash,paper

Portrait of an Unknown Woman (La Belle Ferroniere), 1490, Leonardo Da Vinci

Medium: oil,panel

Head of an Old Man, 1488, Leonardo Da Vinci

Medium: ink,paper

Drapery for a seated figure, 1470, Leonardo Da Vinci

Medium: canvas,tempera

artist-tintoretto:

Miracle of the manna, 1577, Tintoretto

Medium: oil,canvas

https://www.wikiart.org/en/tintoretto/miracle-of-the-manna

artist-francesca:

The Dream of Constantine, 1464, Piero della Francesca

Medium: fresco,wall

artist-botticelli:

The Birth of Venus, 1485, Sandro Botticelli

Medium: canvas,tempera

Study for the Sforza Monument, 1489, Leonardo Da Vinci

Design for a machine for grinding convex lenses, 1500, Leonardo Da Vinci

Medium: ink,paper

https://www.wikiart.org/en/leonardo-da-vinci/design-for-a-machine-for-grinding-convex-lenses