The oeuvre of the German painter Karl Nonn mainly consists of landscapes and cityscapes. He painted en plein air Eifel landscapes in all seasons, villages in Tyrol, impressive snow-capped mountain peaks, winter landscapes and the Matterhorn. At the age of 68 he captures the bombed Bonn in a number of paintings, as a monument to the destruction of urban culture and nature. Nonn attended art and craft school in Düsseldorf and designed furniture and wall decorations. He then attended the academies in Dresden and Berlin. A meeting in the Eifel with the impressionist landscape painter Fritz von Wille was decisive for the artistic path he took.