He was a member of the `` Berliner Sezession '' in 1909 , and he was associated with German expressionist groups : Die Brücke , the Novembergruppe , Gruppe 1919 , the Blaue Reiter circle and Die Blaue Vier ( The Blue Four ) .
He was a member of the `` Berliner Sezession '' in 1909 . He was associated with expressionist group Die Brücke , the Novembergruppe , Gruppe 1919 , the Blaue Reiter circle and The Blue Four .