Lost Art: street posters displayed back to front

I think I saw this show somewhere in Eastern Europe, around 2007-8. I think the artist was French. The works were large ‘paintings’ made of found street adverting, pulled off the original walls and displayed back to front, so you see the glued, torn and soiled side of the layers of paper. Some had text cut into the work. I think the artworks were mid 20th Century, but could have been from the 1970s or perhaps arte povera even. Beautifully subtle, with an irony about commerce and found objects. Does this description sound familiar?