Landberg attended the Royal Art Academy in 1933 and was a pupil of Kresten Iversen and Sigurd Wandel. Landberg is known for his strong modernistic paintings that portrayed common workers and fishermen. Landberg lived and worked in Paris from 1945-49 where he got strongly inspired by French painter André Fougeron. Like Fougeron, Landberg worked on portraying the hardship and tiresome everyday life of common workers. Landberg personal history is a sad one. During the German occupation in Denmark Landberg joined the resistance party “ BOPA” where, he among other things, had to execute Danish informants and Nazi sympathizers . Landberg was a Danish national hero after the war but he rarely spoke of what he did or had witnesses during World War II . His time in BOPA changed him forever and he could no longer bear to live in Denmark and moved to a remote country house in Sweden. In 1973 Landberg committed suicide by throwing himself from a cliff near his house in Sweden. By way of a suicide note, Landberg left a large collection of powerful oils.
The Artists Fall Exhibition : 1934-1947.
Charlottenborg: 1943 and 1948.
Gallery Athenaeum: 1958 and 1961.
Henning Larsen art gallery: 1967.
The Free Exhibition: 1975.