I liked the video you posted! German Expressionism, is the art avant-garde I love most. His art is so real and direct, its stroke is hard. Even for those who has never known his self portraits describe it very well

It's true, I think the same, and I always discover something new about his works, which I definitively love. If you have some more materials about him, share here or add as story on the Like, I'll check it out ;)