Downloadable JPEG in 4226 × 4762 pixels. Public domain licence. Only downside is a required account there, but while it asks for an e-mail address, it doesn't bother to check it. (So why ask? Sounds like a GDPR violation.)
I consider these a baseline for important historical works unencumbered by copyright. There is no reason the Van Gogh Museum should hoard digital assets. That is not their mission.
https://www.nga.gov/collection/art-object-page.163184.html
Downloadable JPEG in 4096 × 2441 pixels. Public domain licence.
Another example of the Rijksmuseum neighbouring the Van Gogh Museum:
https://www.rijksmuseum.nl/nl/rijksstudio/kunstenaars/johann...
Downloadable JPEG in 4226 × 4762 pixels. Public domain licence. Only downside is a required account there, but while it asks for an e-mail address, it doesn't bother to check it. (So why ask? Sounds like a GDPR violation.)
I consider these a baseline for important historical works unencumbered by copyright. There is no reason the Van Gogh Museum should hoard digital assets. That is not their mission.