A Dada periodical founded by Picabia in Barcelona in 1917; subsequent issues were published in New York, Lausanne, Zurich, and Paris until 1924. The name was meant to recall Stieglitz's short-lived periodical 291, to which Picabia had contributed. Although 391 was mainly literary in content, it also included visual material. Issue no. 12 (March 1920) featured Duchamp's mustachioed Mona Lisa on the cover and contained one of Picabia's best-known iconoclastic statements—a large inkblot labelled ‘La Sainte Vierge’.