De Stijl was a Dutch artistic movement founded in 1917 that advocated for ultimate simplicity and abstraction in art through the use of horizontal and vertical lines and primary colors. The movement was centered around the journal of the same name published by Theo van Doesburg to propagate the group's theories. Key members included painters Piet Mondrian, Vilmos Huszar, and Bart van der Leck as well as architects Gerrit Rietveld, Robert van 't Hoff, and J.J.P. Oud. De Stijl influenced architectural and design styles like the Bauhaus and International styles through its emphasis on clean lines and geometric forms.