Theo van Doesburg Theo van Doesburg Theo van Doesburg (, 30 August 1883 – 7 March 1931) was a Dutch artist, who practiced painting, writing, poetry and architecture. He is best known as the founder and leader of De Stijl. He was married to artist, pianist and choreographer Nelly van Doesburg. Theo van Doesburg was born Christian Emil Marie Küpper on 30 August 1883, in Utrecht, the Netherlands, as the son of the photographer and Henrietta Catherina Margadant. After a short training in acting and singing he decided to become a painter. He always regarded his stepfather, Theodorus Doesburg, to be his natural
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