Claim: Adolf Mosengel spent years studying with very well established artists.
Evidence: From 1854 to 1857, Mosengel studied at the Kunstakademie Düsseldorf under Hans Gude, and from 1858 to 1859 in Paris. Hans Fredrik Gude (March 13, 1825 – August 17, 1903) was a Norwegian romanticist painter and is considered along with Johan Christian Dahl to be one of Norway's foremost landscape painters. He has been called a mainstay of Norwegian National Romanticism. In 1861, he studied in Geneva with Alexandre Calame, before settling in Hamburg, where he joined the Hamburg Artists' Association. Alexandre Calame (28 May 1810 – 19 March 1864) was a Swiss landscape painter, associated with the Düsseldorf School. He became quite well known, especially in Germany, although Calame was more a drawer than an illustrator.