http://www.czechpostermuseum.cz/en/
new place for those visiting Prague, very easy to get too,a friend and I visited just after the new year,it had only opened a few weeks previously. very nicely laid out with English translations beside all the posters , some real interesting stuff especially the communist stuff .Personally I would have like to have seen more Beer related posters . Lovely shop and very nice café inside the building and staff are a real delight.I bought a few small posters copies for my man cave.
Great place for an hour or so if the weather is not so good.I felt the 250kc entrance price to be a little on the high side but reasonable value for money and I certainly would visit again.
Thanks, Unclegus. I hope to include Prague in this year's trip, and I love political posters. It's great to hear that this new museum has translated the posters; that's often not done, which is frustrating to me, though I understand that there are lots of languages and only so much wall space.