The Ephemera Assemblyman blog recently turned me on to the gorgeous poster art of Swiss graphic designer Claude Kuhn, who works for the Natural History Museum in Bern. Kuhn designs promotional materials for the museum's exhibits and special events, like this one for Museum Night—when many of the city's museums and libraries stay open into the wee hours, offering special presentations and cheaper tickets for night owls. Which is pretty damn cool, in and of itself.
Besides his museum work, Kuhn is also famous for his unconventional, funny take on boxing posters. Rene Wanner's Poster Page has some great examples of Kuhn's sports event work that you should really check out. The Swiss Poster Collection also has a bunch of Kuhn's posters.