Theo van Doesburg is probably, like the Guardian said last year at the occasion of a Van Doesburg Overview in London’s Tate, ” The Forgotten artist of the avant garde“.
He was born as Christian Emil Marie Küpper in 1883.
Together with Piet Mondriaan (or Mondrian) who he met in 1915, he was one of the founders of De Stijl in 1917, both a magazine and an art movement.
He worked 2 years in Weimar at the Bauhaus under Walter Gropius and with Ludwig Mies van der Rohe. Also clear is that he influenced (and got influenced by) both Piet Mondiaan (or Mondrian) and Gerrit Rietveld who were members of De Stijl as well.
I took this photo in December 2007 when I visited Museum Belvédère near Heereveen, about 1.5 hr driving north east of Amsterdam.