Karl Robert Eduard vonHartmann (23 February 1842 – 5 June 1906) was a German philosopher, independent scholar and writer. He was the author of the influential
of Hartmann. Hartmannvon Aue (c. 1170 – c. 1210) German poet Lukas Hartmann (1944), Swiss novelist and children's literature writer Moritz Hartmann (1821–1872)
Evening Standard asserted that the Paul Hartmann character was based on Adam von Trott zu Solz. Hartmann, like von Trott zu Solz, is executed by hanging