What was Johann Christian Dieterich's friend the first to hold a dedicated professorship in in Germany?
Johann Christian Dieterich Johann Christian Dieterich (1722–1800) was the founder of the Dieterich’schen Verlagsbuchhandlung publishing house and close friend of Georg Christoph Lichtenberg. He published the first "Musen-Almanach".
Christian von Ehrenfels Christian von Ehrenfels (also "Maria Christian Julius Leopold Freiherr von Ehrenfels"; 20 June 1859 – 8 September 1932) was an Austrian philosopher, and is known as one of the founders and precursors of Gestalt psychology.