Harald Sohlberg: A National Treasure Less well known abroad than Edvard Munch, Harald Sohlberg is nevertheless being described by Dulwich Picture Gallery, London, as ‘one of the greatest masters of landscape painting in the history of Norwegian art’. Denying the influence of other artists on his work, and attributing the origins of his ‘artistic awakening’ to his own psyche, his oeuvre unites elements of Romanticism, Naturalism and Sy…