German art
From the early 20th century until 1933, there was a boom (or a big increase) in the production of works of German art of a grotesque style.  Artists using the Satirical-Grotesque genre included George Grosz, Otto Dix and Max Beckmann, at least in their works of the 1920s. The leading artists of Dada in Germany, were Kurt Schwitters and Hannah Höch. They were known for their use of collage for political commentary. Schwitters later developed his Merzbau, a forerunner of installation art. Dix and Grosz were also associated with the Berlin Dada group. Max Ernst led a Dada group in Cologne, where he also worked on collages, but with a great interest in Gothic fantasy. He made a transition into surrealism, and he became the leading German artist of surrealism.  The Swiss-born Paul Klee, Lyonel Feininger and others experimented with cubism.