Oswald Achenbach
(1827–1905 )
 

Oswald Achenbach was a German painter associated with the Düsseldorf school of painting. Though little known today, during his lifetime he was counted among the most important landscape painters of Europe. Through his teaching activities, he influenced the Kunstakademie Düsseldorf. His brother, Andreas Achenbach, who was twelve years older, was also among the most important German landscape painters of the 19th century. The two brothers were humorously called "the A and O of Landscapes" (a reference to their initials matching a common German reference to the Alpha and Omega). 

https://en.wikipedia.org/wiki/Oswald_Achenbach

Market square of Amalfi
1876
Oil on canvas
128 x 111 cm
Alte Nationalgalerie, Berlin
https://recherche.smb.museum/detail/960957