Kunstbibliothek is one of the museums at Kulturforum. They regularly have interesting small scale exhibitions. The latest one displays Chinese poster and book design.
It is usually very quiet as there are not that many visitors so you can spend your time in deep contemplation over poster design without being distracted with commotion around you.
The most poignant poster I’ve ever seen about global warming blew my mind when I made the connection in my brain.
Some of the other beautifully designed posters include a play on Magritte:
and more traditional elements of Chinese culture:
The exhibition is open until May 28th.