You've seen thousands of them. Huge ads and signs painted on the sides of factories, barns, office buildings. The companies are long defunct. The political candidates are long out of office. The signs remain. The idea of SignWall is to create a visual archive of these vanishing landmarks. And as you'll see on the site, I'm not limiting this to just painted signs. Engravings, embossed signs, stone carvings -- these are all fair game.