[1] He grew up in Duisburg[2] and in 1930, began studying art in Essen at the Folkwangschule with his long-time friend Heinz Kiwitz.
Fraenger also commissioned Strupp to illustrate Ludwig Tieck's Merkwürdige Lebensgeschichte Sr. Majestät Abraham Tonelli, but its publication was forbidden by the Reichskulturkammer.
Strupp went to Augsburg, hoping it would be a safer place for him to live than Duisburg, but was swept up by the Gestapo in the wave of arrests after the July 20 plot to kill Hitler.
[1] After World War II, Strupp was put up in the Holbein Haus in Augsburg and given a job as an "upgraded" building superintendent, as he phrased it.
[5] He then became a contributor to the postwar German satirical magazine, Ulenspiegel,[1] founded by two other survivors of Nazi detention, Herbert Sandberg[6] and Günther Weisenborn.