Mathieu Hubertus Josephus Schoenmaekers (13 December 1875, Maastricht - 18 December 1944, Laren) was a mathematician and theosophist who formulated the plastic and philosophical principles of the De Stijl movement. Sources Biography at the Institute for Dutch History (in Dutch) 1875 births 1944 deaths Dutch Theosophists De Stijl People from Maastricht 20th-century Dutch mathematicians