This article, published in the same month of the same year as the first edition of Prisma. Revista mural —the first publication of Argentinean Ultraism in Buenos Aires—can be considered, together with the other text of Jorge Luis Borges published in El Diario Español under the title Ultraísmo, on October 23, 1921, as part of the public strategy implemented by Borges and the ultraístas. This group, consisting of Norah Lange, Norah Borges, Eduardo González Lanuza, Francisco Piñero, and Guillermo Juan, sought to spread the Ultraist aesthetic in Buenos Aires. Jorge Luis Borges, having participated in Spanish Ultraism together with his sister Norah, is significant in this context for introducing German Expressionism—through his translations of various German poets—and also as the theorist of the Ultraist movement. Upon his return to Argentina, he founded and led what is known as the first vanguard movement, positioning himself, consequently, as the movement’s primary theorist. The magazine Nosotros, started by Alfredo Bianchi and Roberto Giusti, was published from 1907 to 1943 and was one of the most important cultural publications in Argentina, besides having a broad circulation throughout Latin America. Beyond its popularity, Nosotros was an important space for the public legitimization of artists and writers. “Rubenism,” as termed in the text, refers to the end-of-the-century modernist aesthetic, whose most important representative was Rubén Darío (1867-1916).