Mathematics and art through the strings as with a bird cage and to see one form within another which excited me." The artists Theo van Doesburg and Piet Mondrian founded the De Stijl movement, which they wanted to "establish a visual vocabulary elementary geometrical forms comprehensible by all and adaptable to any discipline". Many of their artworks visibly consist of ruled squares and triangles, sometimes also with circles. De Stijl artists worked in painting, furniture, interior design and architecture. After the breakup of De Stijl, Van Doesburg founded the Avant-garde Art Concret movement, describing his 1929–1930 "Arithmetic Composition", a series of four black
Willem van der Hoeven of Theo Mommers as new general manager of NAC Breda, van der Hoeven transferred his interim management duties to the current general manager. In his role as chairman, van der Hoeven was responsible for relations with the KNVB, with the Eredivisie, security affairs and personnel affairs. At the end of season 2009/2010 it appeared, despite earlier denials by management and the chairman, that NAC had a debt of 3.2 million Euros. The crisis lead to the resignation of van der Hoeven as chairman. Van der Hoeven was replaced by Bas van Bavel. Willem van der Hoeven was also chairman of