[JOURNAL]. XXe siècle. Cahiers d’Art, edited by Gualtieri di San Lazzaro. Paris, 1951–1974. — 49 volumes, in-4 format, paperback or in publisher’s cardboard binding. Set of 49 issues of the journal XXe Siècle. Founded in 1938 and published until 1981, this iconic art journal was edited by its founder, Gualtieri di San Lazzaro, from 1938 to 1974, and subsequently by Alain Jouffroy. This collection includes 33 different issues, 5 of which are present in two or more copies. Includes: - No. 1 - June 1951: New Destinies of Art. 4 original lithographs by Jean ARP, Henri LAURENS, Marino MARINI, and Henry MOORE. - No. 6 - January 1956: Collage from Cubism to the Present Day. 7 stencils by Georges BRAQUE, Henri LAURENS, Jean ARP, Joan MIRÓ, Alberto MAGNELLI, and Jean DUBUFFET (2) (one of the deluxe copies, No. 26). - No. 8 - January 1957: Art and Humor in the 20th Century. Stencils by Jean DUBUFFET, Jean ARP, and Joan MIRÓ; lithograph by Joan MIRÓ. - No. 10 - March 1958: Plastic Writing. Lithographs by Pablo PICASSO, Jean DUBUFFET, Serge POLIAKOFF, and Zao WOU-KI; slate engraving by Raoul UBAC; stencils by Joan MIRÓ, Max ERNST, Giuseppe CAPOGROSSI, and Victor VASARELY; zincography by Henri MICHAUX. - No. 11 - Christmas 1958: The New Relationships Between Art and Nature. 2 original lithographs by Georges BRAQUE and Max ERNST, and 3 color stencils by Jean ARP, Georges BRAQUE, and Jean BAZAINE. - No. 13 - Christmas 1959: Twenty Years Ago. Black-and-white and color woodcuts and linocuts by Henri MATISSE, Vassili KANDINSKY, Alberto MAGNELLI, Jean ARP, Max ERNST, Joan MIRÓ, and Henri LAURENS, based on the first 20th-century series; one stencil by Zoran MUSIC; one color woodcut by Pietro CONSAGRA; and one original lithograph by Pierre SOULAGES. - No. 14 - June 1960: New Developments in Contemporary Art. Three original lithographs by Pierre ALECHINSKY, François FIEDLER, and Marc CHAGALL. - No. 15, Christmas 1960: The Revolution of Color. Original lithograph by MANESSIER (2 copies). - No. 15, Christmas 1960: The Revolution of Color. Lithograph by Joan MIRÓ (6 copies). - No. 16 - May 1961: The Renewal of Relief. 3 original lithographs by CÉSAR, Joan MIRÓ, and Emilio VEDOVA. - No. 17 - Christmas 1961: Taking Stock of the Century. Original lithograph by Serge POLIAKOFF. - No. 18 - February 1962: Construction of Space. Original lithograph by Vieira da Silva. - No. 19 - June 1962: Decisive Turning Points. Original lithograph by Jean Arp. - No. 20 - Christmas 1962: Art, Consciousness of the World. 3 lithographs by Max ERNST, Alfred MANESSIER, and Enrico BAJ. - No. 21 - May 1963: A Renewal of the Theme in Contemporary Art. Two original lithographs by Wifredo LAM and Marino MARINI. - No. 22 - Christmas 1963: Equivalences and Confrontations. Three original lithographs by René MAGRITTE, Victor BRAUNER, and CÉSAR. - No. 23, May 1964: A Century of Anxiety. Original lithograph by Max ERNST on the cover. - No. 24, December 1964: The Enduring Nature of the Sacred. Two original lithographs by Hans HARTUNG and Joan MIRÓ. - No. 25, June 1965: At the Sources of the Imagination. Original lithograph by Maurice ESTÈVE (2 copies). - No. 26, May 1966: Four Themes. 2 original lithographs by Marc CHAGALL and VIEIRA DA SILVA. - No. 27, December 1966: Kandinsky’s Centennial. Two woodcuts by Kandinsky. - No. 28, June 1967: A Review of Abstract Art Around the World. Original lithographs by Joan MIRÓ and Marino MARINI. - No. 30, June 1968: Panorama 68. Two original lithographs by Marino MARINI and Maurice ESTÈVE. - No. 31, December 1968: Panorama. Two original lithographs by Joan MIRÓ and POLIAKOFF. - No. 32, June 1969: Panorama 69*. Two original lithographs by André MASSON and Sonia DELAUNAY (2 copies). - No. 33, December 1969: Panorama 69**. 2 original lithographs by Maurice ESTÈVE and Giuseppe CAPOGROSSI (9 copies). - No. 34, June 1970: Panorama 70*. 2 original lithographs by Marc CHAGALL and Pierre SOULAGES. - No. 35, December 1970: Panorama 70**. Original lithographs by Marino MARINI and Anna-Eva BERGMAN. - Tribute to Henri Matisse. Special non-subscription issue. 1970. Complete with dust jacket. - Tribute to Georges Rouault. 1971. Lithograph based on an original work by ROUAULT. Complete with dust jacket. - Tribute to Fernand Léger. Special non-subscription issue. 1971. Color lithograph from a second print run. Complete with dust jacket. - Tribute to Max Ernst. Special non-subscription issue. 1971. Original lithograph by Max Ernst. Complete with dust jacket. - No. 42, June 1974: Panorama 74*. Original lithographs by Max Ernst, Richard Lindner, and Dorothea Tanning. Included are 5 additional issues from which the original lithographs have been removed: - No. 20 - Christmas 1962: Art, Consciousness of the World. - No. 27, December 1966: Kandinsky’s Centennial. - No. 28, July