There's a derelict shopfront on Burbank Street around the corner from where I live in the Fenway that has, over the years, attracted its share of graffiti and guerrilla ads, but sometime in the last week or two — overnight, basically — a full-blown quadtych collage appeared:

I think to the casual observer, it might look like your typical urban eyesore, but on close inspection you see, if not sense exactly, a single sensibility that spans all four panels...

This reminds me a little of a static, real-world version of a typical NSFW tumblr blog like goldenfleecing, with its irreverent, nonsensical narrative.  Snippets of stolen dreams and visions stuck together to convey a single sensibility.  Collage, whether in the from of digital "collogs" or old-school masterworks by outsiders like Joseph Cornell or Henry Darger, are fascinating ruminations on not only found scraps of mass culture, but the utterly unique inspirations and identities we piece together from them.

Of course, modern collage has its roots in Dada and Surrealism (and vice-versa), and while street art collage has reached its high-art apogee in fussy Shepard Fairey, this sort of sly, subversive old-school cut-and-paste is still surprisingly compelling. 

This quadtych isn't high art, of course.  Spontaneous, and delightfully transient, it's subversiveness lies partly in the fact that it could easily be mistaken by hardened eyes for random scraps plastered to an abandoned storefront.  It is, in other words, not only a work of art made of found objects, but itself an object of art waiting in plain sight to be found.