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 Waeyenberge Foundation). He has been honored as a "Commandeur in de Orde van Oranje-Nassau" (Dutch) and "Officier in de Leopoldsorde" (Belgian). Piet Van Waeyenberge Piet Paul August, Baron Van Waeyenberge (born Ghent 27 October 1938) is a Belgian businessman. He is a son of Camille Van Waeyenberge and a brother of Jozef Van Waeyenberge. He was one of the founders, and is currently president, of business club De Warande. He is married to Wina Proesmans and together they have 3 children. He graduated in 1956 from high school at the Sint-Jan Berchmanscollege in Brussels and obtained a licentate in Commercial and