Around 1915, Van Doesburg started meeting the artists who would eventually become the founders of the journal. He first met Piet Mondrian at an exhibition in Stedelijk Museum Amsterdam. Mondrian, who had moved to Paris in 1912 (and there, changed his name from "Mondriaan"), had been visiting the Netherlands when war broke out. He could not return to Paris, and was staying in the artists' community of Laren, where he met Bart van der Leck and regularly saw M. H. J. Schoenmaekers. In 1915, Schoenmaekers published "Het nieuwe wereldbeeld" ("The New Image of the World"), followed in 1916 by "Beginselen der beeldende wiskunde" ("Principles of Plastic Mathematics"). These two publications would greatly influence Mondrian and other members of De Stijl.