Wallpaper, once scorned as fussy, has come into its own lately, with powerful patterns and brilliant palettes. But the genre's history is deep and even surprising. Join Carolle Thibaut-Pomerantz, the world's leading dealer in antique wallpapers, and Chris Ohrstrom, co-founder of the handmade wallpaper firm Adelphi Paper Hangings, as we look at the papers that decorate one's private rooms, the provocative designs that persist today, and the mode of creation, which remains as laborious and precise as it was more than 200 years ago.