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
Piet van Reenen to play at Ajax in 1929 after the degradation of UVV. At Ajax he played on September 15, 1929 (debut against DFC) until October 18, 1942 (against Blauw-Wit Amsterdam). After Van Reenen had stopped all actually after the 1939-1940 season he later sometimes turn up as Ajax was in distress. Van Reenen eventually stopped at 33 with football. Despite his great talent, Van Reenen played only two matches for the Dutch national team scoring no goals. Piet van Reenen Piet van Reenen born (17 January 1909 – 8 June 1969) was a Dutch former professional footballer who was a prolific