5 October 1894, in Göttelborn, Ottweiler district, Saarland; d. 22 August 1960, in Berlin), daughter of the Prussian official Ernst Wiggert and Elisabeth Schmidt.
On 29 June 1918, he was appointed as a civil servant (Regierungsassessor) in the Ministry of Science, Art and National Education.
Harnack was dismissed from government service after the so-called Preußenschlag by Reichskanzler (Chancellor) Franz von Papen on 20 July 1932.
On 27 November 1921 he was elected to the executive committee of the Kirchenpartei[1] called Bund religiöser Sozialisten (Federation of Religious Socialists).
Accused of being a participant in the 20 July Plot in 1944, he was executed in March 1945 in Plötzensee and buried in an unmarked grave.