Gabriele Münter (February 19, 1877-May 19, 1962) was a German expressionist painter who was at the forefront of the Munich avant-garde in the early 20th century.
Biography on Wikipedia: https://en.wikipedia.org/wiki/Gabriele_M%C3%BCnter
Lady in an Armchair, Writing by Gabriele Münter
1929 / Oil on canvas / 24 1/5″x18 1/5″ / Municipal Gallery of the Lenbachhaus, Munich, Germany
Gabriele Münter on Artnet: http://www.artnet.com/artists/gabriele-m%C3%BCnter/