his drawings in newspapers, mostly in the US, where he was recognized earlier than in Europe and illustrated books by Franz Kafka, Ray Bradbury, Jorge Luis Borges, Guillaume Apollinaire, Jacques Prévert, Boris Vian, Guy de Maupassant, Albert Camus, Herbert George Wells, Jean de La Fontaine and Romain Gary, under the name of Émile Ajar. He never really changed his style, whose most famous emblem is the "bird-man" but used all kinds of supports; Folon made murals (Magic City for the Brussels subway, 1974; Waterloo Station for the London tube, 1975), posters for theater and opera (Spoleto Festival, 1978; Teatro Olimpicio, 1987) and cinema (The Purple Rose of Cairo, by Woody Allen, 1985; La spirale, by Armand Mattelart and Chris Marker, 1976), theater and opera scenery (Geneva and Brussels, 1981; Venice and Roma, 1989), short films for TV (Italiques TV show, by Marc Gilbert , on the soundtrack of Gott mit uns composed by Ennio Morricone, 1971-1974, opening and closing sections for the French channel Antenne 2, 1975–1984), wooden sculptures, logotypes (Éditions Larousse, Bicentenary of the French Revolution, 1989; Philexfrance, 1989), tapestries (Congress Hall of Monaco, 1989), ships (1990), logos (bird emblem for the Tignes-Albertville Paralympic Winter Games, 1992), church windows (1992), sculptures (La mer, ce grand sculpteur, Knokke, 1997), and even a Palio flag (Siena, 1999). His artistic value was recognized by several exhibitions organized in the most famous galleries and museums in the world (Musée des Arts Décoratifs, Paris, 1971; Arts Club of Chicago, 1972; Museum Boijmans Van Beuningen, Rotterdam, 1976; Transworld Art, Washington, D.C., 1977; Musée d'Art Moderne de Liège, 1978; Musée Picasso, Antibes, 1984; Correr Museum, Venice, 1985; Metropolitan Museum of Art, New York, 1990; La Pedrera, Barcelona, 1993; Bunkamura Museum, Tokyo, 1995; Olympic Museum, Lausanne, 1996). He credits Giorgio Soavi for publishing his first posters, which were designed for Olivetti in Milan: "As he has done for many artists, Soavi suggested to me, too, that I invent things that were out of the ordinary for me. This attitude has created such a fertile spirit of invention around him that one wonders if he is not the true author of the works that he has thus encouraged." Soavi also was largely responsible for the 1975 book Lettres a Giorgio, which reproduces 40 envelopes, each an original watercolor addressed to Soavi—most to his Milan home—and delivered by the mail from various international addresses. Folon writes in a brief