Idk if its authors count as artists, but I’m a fan of the US Constitution. A lot of its authors were slave holders though, so nearly the worst a person can be.
This is probably a controversial one. As someone who studied modern political history, the U.S. Constitution is - taken completely subjective for its time, authors, situation, etc. - an amazing piece of human achievement. It's a shame that so many people view it was some static command from the past, rather than the living document that it's authors intended it to be.