At the Musee de l'Orangerie, there are two miniature rooms on display.  Unfortunately, I don't read French, nor did I take any readable pictures of the sign telling you about them.  So I don't know anything about them, other than that they are darling.  I love all of the detail that went into these little rooms.
If any of you know anything about them, please share!  I'd love to know.  :)