"Karl Wilhelm Gropius, also Carl Wilhelm Gropius (4 April 1793–20 February 1870), was a German set painter and scenic artist, working in the theatres of Berlin. ...
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He was also a printmaker and seller and a prolific caricaturist.
^ Johannes Brahms (2001). Johannes Brahms: Life and Letters. Oxford University Press. p. 387. ISBN 978-0-19-924773-8.^ Benedict Taylor (5 July 2017). Mendelssohn. Taylor & Francis. p. 20. ISBN 978-1-351-55852-5. Retrieved 28 August 2018.^ British Museum^ Robert Dohme (1879), "Gropius, Carl", Allgemeine Deutsche Biographie (ADB) (in German), 9, Leipzig: Duncker & Humblot, p. 733" - (en.wikipedia.org 05.11.2019)