It is no secret that Polish Film Posters were, historically, designed in a much more artistic and freely interpreted way than most of the US equivalents. Davis recently sent along a link to this Polish Film Poster Archive and it certainly confirms that idea. Even if you haven't heard of the specific title, you'd be hard pressed to imagine such an artistic undertaking as the main movie poster for anything these days. I'm partial to pieces like Far from the Maddening Crowd or 2 Weeks In September but the simple lines of New York, New York can't be denied either - albeit it for very different reasons.

Long story short, click just about anywhere in that repository and you'll find something inspiring.