Euler's Eyes
2026-10-16
History of Mathematics
Page 191 of 191
Image credits
Historical images and photographs
All of them come from Wikimedia Commons. We use the thumbnails provided by Commons, with no editing beyond compression.
- Turing at 16, passport photo attributed to Arthur Reginald Chaffin: source page · public domain.
- Turing in 1951, portrait by the Elliott & Fry studio: source page · public domain.
- King’s College chapel, photo by Martinvl: source page · CC BY-SA 4.0.
- The Bletchley Park mansion, photo by DeFacto: source page · CC BY-SA 4.0.
- A three-rotor Enigma, National Security Agency: source page · public domain.
- The bombe rebuild, photo by Mike Peel: source page · CC BY-SA 4.0.
- The Pilot ACE, photo by Philafrenzy: source page · CC BY 2.0.
- Replica of the Manchester Baby, photo by Parrot of Doom: source page · CC BY-SA 3.0.
- The Sackville Park statue, photo by David Dixon: source page · CC BY-SA 2.0.
- The skin of the giant pufferfish, photo by Chiswick Chap: source page · CC BY-SA 3.0.
- Turing’s patterns and the cheetah, figure by Philip Ball: source page · CC BY 4.0.
Figures made for the site
The cover, the interactive Turing machine and the reaction–diffusion simulation were made for this trail. The simulation uses the Gray–Scott model, computed on a 200 by 200 grid of cells, and contains no text, so it serves all the languages of the site. The interactive machine works in all four languages.
Record
The file data/turing_imagens.json records the source, licence, verification date and SHA-256 hash of each downloaded image. The historical sources for each topic are listed at the end of each post.