(b Berlin, Sept 27, 1894; d Berlin, July 12, 1967).
German painter, printmaker and writer. He showed talent as a draughtsman at an early age. After showing Bruno Paul some drawings in 1908, he was promised a free place in the education department of the Kunstgewerbemuseum, Berlin, following his training as a craftsman. He studied briefly in a stained-glass workshop (1908–10) but abandoned this to work as a studio assistant (1910–21). From 1913 to 1914 he also attended evening classes in drawing. As a pacifist he refused military service and was temporarily imprisoned. In 1919 his application to the Hochschule für Bildende Künste in Charlottenburg, Berlin, was rejected.
At the home of the architect and art critic Adolf Behne (1855–1948) Nagel saw for the first time paintings by August Macke, whose bold use of colour made a lasting impression on his work, for example Self-portrait with Hat (oil on cardboard, 1920; Berlin, priv. col., see ...