What open access means
When a work's copyright has expired (in most countries 70 years after the artist died), museums that photograph it can release the photograph under CC0. The Met, the Art Institute of Chicago and the Cleveland Museum of Art do this for hundreds of thousands of works and offer the files at print resolution. Works still in copyright stay out of these collections.
Using museum images well
Crop and recolour freely: CC0 has no conditions. A credit line ('Vincent van Gogh, Sunflowers, 1887. The Metropolitan Museum of Art') is good manners and helps your readers. Use the largest file for print: museum originals often run to 4000 pixels or more, and the Cleveland Museum of Art also offers full-resolution TIFFs.



