A.M. Cassandre (pseudonym of Adolphe Jean-Marie Mouron, 1901 – 1968) was a pioneering French graphic designer, poster artist, and typographer who essentially invented the visual language of the modern commercial poster. Working primarily in Paris during the interwar period, he brought the structural geometry of Cubism, Purism, and Futurism to commercial advertising, transforming the street into an open-air art gallery