This work is by one of the most well known figures in graphic design, and especially typography, Muller-Brockmann. Muller-Brockmann’s work is, in my opinion, is vital in the learning of all graphic design. I learned the grid system, which I now use all the time when designing. Before seeing his work I didn’t know what the grid system was and his posters show it so clearly. His posters were also my first introduction to traditional typography and they are a huge influence on the typography work that I do.