Adolphe-Jean-Marie Mouron was born in Kharkiv in 1901, the son of a French wine merchant based in the Russian Empire. The family returned to Paris at the outbreak of the First World War. He trained at the École des Beaux-Arts and the Académie Julian, and by 1923 he was working commercially under the pseudonym Cassandre — a name he would use for the rest of his career.
His first major commercial poster, Au Bûcheron (1923), brought immediate attention. Over the next decade he produced a sustained run of travel, product and event posters that defined the visual language of French Art Deco commercial design — Étoile du Nord (1927), Nord Express (1927), L.M.S. Bestway (1928), the Dubonnet serial campaign (1932), Normandie (1935).
In 1926 he co-founded Alliance Graphique with Maurice Moyrand — one of the first modern advertising agencies in France. Through Alliance Graphique he also began designing typefaces for Deberny & Peignot: Bifur (1929), Acier Noir (1935) and Peignot (1937). The 1937 Paris Exposition Internationale awarded him a Grand Prix.
In 1939, at the peak of his poster-design reputation, he largely abandoned commercial work for stage design (Comédie-Française, Opéra de Paris, Metropolitan Opera) and painting. He returned intermittently to commercial projects, most famously producing the cursive YSL monogram for Yves Saint Laurent in 1963 — a logo still in use more than six decades later. He died in Paris in 1968, aged sixty-seven.







