History of painting group's theories. Next to van Doesburg, the group's principal members were the painters Piet Mondrian, Vilmos Huszár, and Bart van der Leck, and the architects Gerrit Rietveld, Robert van 't Hoff, and J. J. P. Oud. The artistic philosophy that formed a basis for the group's work is known as "neoplasticism" — the new plastic art (or "Nieuwe Beelding" in Dutch). Proponents of De Stijl sought to express a new utopian ideal of spiritual harmony and order. They advocated pure abstraction and universality by a reduction to the essentials of form and colour; they simplified visual compositions to the vertical
Theo van Gogh (art dealer) letters Vincent wrote during his life were to Theo, including his first and his last letters. It is largely thanks to Theo and his wife that these letters are available today. Hardly any of Theo's letters remain because Vincent failed to keep them. The letters have been collected and published in book form as "The Letters of Vincent van Gogh". The relationship between the two brothers was the subject of the movie "Vincent & Theo" (1990), directed by Robert Altman. It also formed an important part of the film "Lust for Life" (1956), which was directed by Vincente Minnelli. Theo