Gabriele Münter (1877-1962) was a German Expressionist painter and one of the most important members of the avant-garde group Der Blaue Reiter (The Blue Rider). She was a pioneering female artist
From Wikipedia
Gabriele Münter was a German expressionist painter who was at the forefront of the Munich avant-garde in the early 20th century. She studied and lived with the painter Wassily Kandinsky and was a founding member of the expressionist group Der Blaue Reiter.