At least some of the employees of design firm A Gray Space collect Polish movie posters. This page shows some absolutely fantastic posters covering nearly 70 years.
Behold, Melanie Griffiths vehicle “Working Girl” gets greater artistic treatment in a poster than it did in the original film.
All kidding aside, there are some beautiful designs here, including some that remind me of 1950s–1960s Ben Shahn. This page reads like a synopsis of European commercial graphic design.