It's located at the Getty Museum (the Getty Center, not the Getty Villa), and is so fragile, it cannot be moved, which is why it's one of the few paintings they won't loan to another museum. I've also seen the preparatory painting he made for this piece, which of course is much smaller, but just as beautiful. Also, if i remember correctly, he painted his mother (or mother in law) into the picture, but did not get along with her, so painted her ugly.