Each January, the imm cologne furniture fair in Cologne, Germany, unveils “Das Haus,” a conceptual installation by a world-renowned designer or architect. Over the course of six days, hundreds of attendees stream in and out of the space. Previous designers have included Luca Nichetto, Louise Campbell, Neri & Hu, and Sebastian Herkner. This year, for the first time, an American makes a debut.  Photo 3 of 3 in The American Way