![](/data/san/images/79/106960-v_2178_k2/portraet_von_christian_we/200w_portraet-von-christian-weise-106960-719904.jpg)
"Christian Weise (30 April 1642 – 21 October 1708), also known under the pseudonyms Siegmund Gleichviel, Orontes, Catharinus Civilis and Tarquinius Eatullus, was a German writer, dramatist, poet, pedagogue and librarian of the Baroque era. He produced a large number of dramatic works, noted for their social criticism and idiomatic style. In the 1670s he started a fashion for German "political novels". He has also been credited with the invention of the mathematical Euler diagram, though this is uncertain." - (en.wikipedia.org 18.04.2021)