As an example I downloaded the image https://www.britishmuseum.org/collection/image/1613717051 (~1 MB, 2500x1973).
Still good enough for many use cases, but it limits personal prints.
[1] https://www.britishmuseum.org/terms-use/copyright-and-permis...
Some other countries have more of a laboriousness based theory though.
Further, you're saying that artifacts plundered from colonialist rule should then be restricted to the people they've plundered from under restrictive licensing terms?
I'm saying they have the copyright.
Here we go...
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ps. both my shallow dismissal and your OT flamebait are discouraged here, so let's call it even and move on