What if I draw some other painting but an obscure artist hanging in the same museum and sell that?
What if I attribute the work as in “My drawing of the Mona Lisa” or “My drawing of this picture I saw by <painter>”
What if my drawings look very different than the original? Does that matter?
https://en.wikipedia.org/wiki/Mona_Lisa_replicas_and_reinter...
In the eyes of international copyright law, attribution times not matter at all. Looking different or being transformative does not matter at all.
These things may matter to some people, being transformative in some ways may matter to some local laws, and the Mona Lisa being too old to be under copyright matters a lot.
You can sell a copy of anything not covered by copyrights. You just can't lie to people about what you are selling.