Who is Van Gogh 's brother ?
While in Saint - Remy interest began to build in van Gogh 's work : Theo , Van Gogh 's brother , wrote in July 1889 , that Camille and Lucien Pissarro , Père Tanguy , Erik Theodor Werenskiold and Octave Maus , secretary of the Les XX group in Brussels , had seen the paintings that he 'd made in southern France .