 I don't think it matters at all. The only thing that I guess you'd say is that if part of what has moved you is the idea that this was painted by a particular person, if you find out that it wasn't painted by that particular person, then that can take away from the experience. But really, is there any need for that to be part of the effect? I don't think so, usually. I think it is exciting to look at a painting and think, wow, Rembrandt's hand...