This author of
A landscape by this artist is divided by two vertical lines that turn out to be two lances held up by Cossacks in front of a blue mountain. His early works include various landscapes made during his stay in Murnau with his mistress Gabriele Munter. He drew inspiration from his friend Arnold Schoenberg to argue that painting should be (*) abstract to express the inner self, which is reflected in the titles of his Improvisations and his ten Compositions. This author of On the Spiritual in Art also painted a work which lent its name to a German expressionist movement in the 1910s. For 10 points, name this Russian-born painter of The Blue Rider.
A landscape by this artist is divided by two vertical lines that turn out to be two lances held up by Cossacks in front of a blue mountain.
Wassily Kandinsky