Werner Keller was a German civil servant, journalist, nonfiction author and anti-Nazi resistance fighter.
He studied Engineering and Medicine, and then Jurisprudence, in Berlin, Rostock, Zurich and Jena. In 1933 he became a Doctor of Jurisprudence.
While working as a senior staff member in Albert Speer's Ministry of Armaments, he saved the lives of many Jews. In 1945 Keller organized an anti-Nazi resistance group in Berlin which briefly ran a pirate radio station and which planned a rather foolhardy attempt on Hitler's life.
Wikipedia https://en.wikipedia.org/wiki/Werner_Keller_(writer)
Coordinates 51°56'3.561" N 11°57'12.281" E