So here is the backside of the Brochure, which acts as a poster. Since the audience will be receiving this in the brochure format, they're more likely to look through the brochure and accept it as just a brochure. The arrows in the brochure (which you may or may not have noticed) are meant to direct the viewer to look on the opposite side of the paper. And viola, they get a free poster out of it.

If you looked at the Invite, you'll notice venetian wallpaper coupled with a modern chair. And here you see more modern wallpaper coupled with a somewhat venetian chair. It is both a coupling of time periods through texture, and an indication of architecture through familiar home elements.

The angle is meant to be a bit confusing. It's the same angle as the brochure, except flipped, in a way. This makes the angle reference familiar but unique, and also turns the slash in "twenty/20" into a straight line.