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
Jef Van der Veken later restorer deceptively had added new elements such as the background and the figure of the angel. The suspicion is that this restorer was Jef Van der Veken. The conclusion of the recent scientific findings is that both Van der Veken and Renders appear to have engaged in intentional art forgery. Since these revelations, all the works that had belonged to the Renders Collection or had been handled by Van der Veken and even his son-in-law Albert Philippot, many of which hang in major museums in Belgium and abroad, are viewed with suspicion. Jef Van der Veken Jef Van der