Gertrud Arndt was a German photographer and designer associated with the Bauhaus movement. She is remembered for her pioneering series of self-portraits from around 1930.
Arndt in 1930; Mask portrait No. 13
Paul Klee was a Swiss-born German artist. His highly individual style was influenced by movements in art that included expressionism, cubism, and surrealism.
Portrait of Paul Klee, Hugo Erfurth (1922)
My Room (German: Meine Bude), 1896. Pen and ink wash, 120 by 190 mm (4+3⁄4 by 7+1⁄2 in). In the collection of the Klee Foundation, Bern, Switzerland
Sketch of Felix Klee as an infant, 1908, by Paul Klee. Ink wash on paper (The Berggruen Klee Collection)