If you believe in the whole cavemen story, then it means that art has been around far longer than any of us really care to look. The things that were created by man way back when, which include but are not limited to sculptures, paintings, drawings, and photography, have been documented since we figured out how to get it done. Obviously, some pieces are popular than others, but that's just the way of humans.
Artists like Picasso, Klimt, van Gogh, Monet, and Kahlo have all made their mark and have left pieces that have transcended their deaths. But where are these pieces? It's enough for the regular person to know the name of the work of art on sight, but you're more than a regular person. You're an art guru who has been keeping up with all things in the art world, so much so that you know where these famous pieces are being held. Oh, we won't ask you to name the facility, because that's just asking too much. All you need to do is tell us the city where these pieces are.
If you're as good as you think you are, it's time to tell which the locations of these amazing pieces of art.