The column statues of Chartres Cathedral's Royal Portal, from an 1857 photograph by the Bisson brothers, reprinted as a soft blue cyanotype on cream paper.
The original
“Chartres Cathedral, West Facade; Royal Portal, Central Bay” by Bisson Frères (French, active 1840–1864), 1857, is in the public domain. The image comes from the Art Institute of Chicago, which shares it under CC0 (no rights reserved).
The print
Tiraj turns the albumen photograph into a cyanotype, the iron-based sun print of early photography: a single soft Prussian blue for the carved kings and queens, with a pale, brushed coating and uneven edges.
The paper tone is part of the artwork; print on white matte paper. The cream sheet and the brushed coating are printed into the file.
What’s included
5 high-resolution JPEG files (sRGB), one per proportion:
| Ratio | Print sizes | Pixels | Resolution |
|---|
| 2:3 | 4×6, 8×12, 12×18, 16×24, 20×30, 24×36 in | 7200×10800 px | 300 dpi at 24×36 |
|---|
| 3:4 | 6×8, 9×12, 12×16, 18×24 in | 5400×7200 px | 300 dpi at 18×24 |
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| 4:5 | 4×5, 8×10, 16×20 in | 4800×6000 px | 300 dpi at 16×20 |
|---|
| 11:14 | 11×14 in | 3300×4200 px | 300 dpi at 11×14 |
|---|
| ISO A | A5, A4, A3, A2, A1 | 7016×9933 px | 300 dpi at A1 |
|---|
All files are 300 dpi at their largest size.
Each file is laid out for its proportion.
Printing tips
Use heavyweight white matte paper (200 gsm or more, archival matte or cotton rag). Print at 100% / actual size, not 'fit to page', and pick the file that matches your frame.
Colours can vary slightly between screens and printers.
License
The original is in the public domain (verified with the museum’s API on 2026-11-07). The Tiraj interpretation is ours: the files are for personal use only. Print them for your own home or as a gift; please don’t resell, share or redistribute the files or sell prints made from them. Full license.
Digital download: nothing is shipped, frame not included. Colours vary slightly between screens and printers.
