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
Theo van Gogh (art dealer) caused by "heredity, chronic disease, overwork, sadness". In 1914, Theo's body was exhumed and reburied with his brother at Auvers-sur-Oise. Theo van Gogh (art dealer) Theodorus "Theo" van Gogh (; 1 May 1857 – 25 January 1891) was a Dutch art dealer. He was the younger brother of Vincent van Gogh, and Theo's unfailing financial and emotional support allowed his brother to devote himself entirely to painting. Theo died at the age of 33, six months after his brother died at the age of 37. Theo is widely known for his influence on his brother; however, this often overshadows the