was responsible for another extreme development inspired by Cubism. The ready-made arose from a joint consideration that the work itself is considered an object (just as a painting), and that it uses the material detritus of the world (as collage and papier collé in the Cubist construction and Assemblage). The next logical step, for Duchamp, was to present an ordinary object as a self-sufficient work of art representing only itself. In 1913 he attached a bicycle wheel to a kitchen stool and in 1914 selected a bottle-drying rack as a sculpture in its own right. Section d'Or The Section d'Or, also known as Groupe de Puteaux, founded by some of the most conspicuous Cubists, was a collective of painters, sculptors and critics associated with Cubism and Orphism, active from 1911 through about 1914, coming to prominence in the wake of their controversial showing at the 1911 Salon des Indépendants. The Salon de la Section d'Or at the Galerie La Boétie in Paris, October 1912, was arguably the most important pre-World War I Cubist exhibition; exposing Cubism to a wide audience. Over 200 works were displayed, and the fact that many of the artists showed artworks representative of their development from 1909 to 1912 gave the exhibition the allure of a Cubist retrospective. The group seems to have adopted the name Section d'Or to distinguish themselves from the narrower definition of Cubism developed in parallel by Pablo Picasso and Georges Braque in the Montmartre quarter of Paris, and to show that Cubism, rather than being an isolated art-form, represented the continuation of a grand tradition (indeed, the golden ratio had fascinated Western intellectuals of diverse interests for at least 2,400 years). The idea of the Section d'Or originated in the course of conversations between Metzinger, Gleizes and Jacques Villon. The group's title was suggested by Villon, after reading a 1910 translation of Leonardo da Vinci's Trattato della Pittura by Joséphin Péladan. During the late 19th and early 20th centuries, Europeans were discovering African, Polynesian, Micronesian and Native American art. Artists such as Paul Gauguin, Henri Matisse, and Pablo Picasso were intrigued and inspired by the stark power and simplicity of styles of those foreign cultures. Around 1906, Picasso met Matisse through Gertrude Stein, at a time when both artists had recently acquired an interest in primitivism, Iberian sculpture, African art and African tribal masks. They became friendly rivals and competed with