In case anyone else wanted to see some of these posters: http://www.poster.pl/polish_poster_artists.html
I clicked on the only one from your link that was immediately obvious to me, "Last Tango in Paris", and ended up at a page with many well-known films and fantastic posters for them: http://www.poster.pl/gallery/?q=Homework_Joanna_Gorska_Jerzy...