History of painting group's theories. Next to van Doesburg, the group's principal members were the painters Piet Mondrian, Vilmos Huszár, and Bart van der Leck, and the architects Gerrit Rietveld, Robert van 't Hoff, and J. J. P. Oud. The artistic philosophy that formed a basis for the group's work is known as "neoplasticism" — the new plastic art (or "Nieuwe Beelding" in Dutch). Proponents of De Stijl sought to express a new utopian ideal of spiritual harmony and order. They advocated pure abstraction and universality by a reduction to the essentials of form and colour; they simplified visual compositions to the vertical
Cornelis van der Sluys Cornelis van der Sluys Cornelis van der Sluys (Brouwershaven, 4 June 1883 – Amsterdam, 4 January 1944) was a Dutch furniture and textile designer, interior designer, decorator, glass painter, sculptor, goldsmith, organizer, and publicist. Van der Sluys designed textile, made designs for carpets, wallpaper and chairs and ceramic decorations on pottery for the first Steenwijker Art Pottery Factory. From 1901 to 1904 he designed Belgian and French Art Nouveau, Arts & Crafts copper work and designs for batiks for the Hague art dealers. Cornelis van der Sluys was the son of Willem van der Sluys (agent) and Anna Constandse. He