They ought to be recorded somewhere, I'd imagine. Even if they aren't, I know a lot of them from the few years I spent really intensely studying art. I'm fairly certain the first two you mention are one of Monet's Water Lilies (he did over two hundred of them, believe it or not) and Munch's The Scream just from the descriptions. Monet's an Impressionist, which is one of my favourite movements.