Albert Einstein was a genius but he was also probably a pretty cool guy. He is often considered the father of modern physics and one of the smartest people to have ever lived. Einstein is probably most famous for his theory of relativity and mass-energy equivalence (E=MC2).
Posters featuring quotes from Einstein as well as the famous images of him riding a bicycle and sticking out his tongue have been popular for generations. An Albert Einstein poster will make your walls look smart in more ways than one.