It led to intellectual street art'. One of the campaigning posters of Lech Walesa's Solidarnosc union from 1989 is a good example. It pictures a cowboy armed with a ballot-paper a as a symbol of change, on the way to the future. The posters are, in all their simplicity, artistic puzzles. And that is what makes them popular the world over.
Posters are a good mirror image of Polish culture.
At first glance inscrutable and melancholic, but after a bit of perseverance and a couple of vodka's a new world will open itself for you.