Composition with Red Blue and Yellow working relationship, they were contacted by Theo van Doesburg, a painter who frequently wrote about art for different periodicals and whom is considered the propagandist of the De Stijl movement. He invited Mondrian and van der Leck to join his initiative to start an artistic review periodical. They agreed and the result of this was the journal entitled De Stijl. Together they formed an artistic collective that consisted not only of painters but also architects; the movement was confined to strictly Dutch areas due to war. These artists cannot be considered the same. For example, not all De Stijl artists
Helene Kröller-Müller the first people to recognise the genius of Vincent van Gogh. She eventually amassed more than 90 van Gogh paintings and 185 drawings, one of the world's largest collections of the artist's work, second only to the Van Gogh Museum in Amsterdam. She also bought more than 400 works by Dutch artist Bart van der Leck, but his popularity did not take off like van Gogh's. Kröller-Müller also collected works by modern artists, such as Picasso, Georges Braque, Jean Metzinger, Albert Gleizes, Fernand Léger, Diego Rivera, Juan Gris, Piet Mondrian, Gino Severini, Joseph Csaky, Auguste Herbin, Georges Valmier, María Blanchard,