I was at Nordiska Museet, and their exhibition "Tapeter, tapeter!" about wallpaper. I don't really have an historical interest in wallpapers, but they have a great many old ones from the 18th and 19th century on display. Also a few from the 40's through 60's, and some that appeared to be fairly new. I love wallpaper. Not so much that I actually have them on my walls, but I love them all the same. Particularly in books.