- Museo Galileo - Link
- Leonardo's Wikipedia Page
- Leonardo da Vinci: anatomical drawings from the Royal Library, Windsor Castle, exhibition catalog fully online as PDF from The Metropolitan Museum of Art, which contains material on Salvator Mundi (see index)
- The multi award winning Leonardo da Vinci: Anatomy app, which accompanies the exhibition, is now available to buy on the app store .
- View all of Leonardo's drawings in the Royal Collection
- British Library: Leonardo da Vinci's notebooks - overview
- n2davinciandbeyond.com: "This site is dedicated to sharing the discovery of amazing hidden images and optical illusions found within ALL of Leonardo da Vinci's works of art."
- Leonardo's Handwriting Generator -