- Category : 1894-births
- Type : PSP
- Profile : 1/3 - Investigating / Martyr
- Definition : Single
- Incarnation Cross : RAX Service 3
German painter, very active in the Berlin art scene throughout the 1920s, becoming acquainted with Käthe Kollwitz, El Lissitzky, and many other notables.
He was a conscientious objector during the First World War, and was imprisoned for refusing to serve. After the war he first began to paint after being exposed to the work of August Macke.
In 1933, Nagel was elected chairman of the National Association of Visual Artists of Germany, but the election was annulled by the Nazis the next day. When the Nazis seized power, much of Nagel's work was declared degenerate. He was forbidden to paint, and from 1936 to 1937 he was incarcerated in various Nazi concentration camps, including Sachsenhausen.
From 1956 to 1962, he was the president of the DDR Academy of Arts, Berlin. He died at Berlin-Biesdorf on 12 July 1967, aged 72.