I love this idea. A reader directed us to a BetterWall, website that sells the street pole banners advertising museum exhibits. You may not be able to afford the artwork itself but getting the massive poster is quite reasonable. The one shown here, which at 99" long needs a big wall, sells for $745. The program helps keep the vinyl banners out of landfills and the museums get a portion of the profits. Some of the banners have wind-slits to withstand high wind but don't have large rips, tears, or fading.

[Thanks, Eric]