painter who was one of the major figures in the renascence of mural painting in Norway after 1920. He was the son of the painter Christian Krohg and studied under him at the Académie Colarossi (1903–07) in Paris. He also studied under the French painter Henri Matisse (Matisse, Henri) from 1907 to 1909. Krohg returned to Norway in 1930, where he taught at the State Art and Craft School (1935–46), afterward being appointed professor at the State Art Academy in Oslo. He was commissioned to paint frescoes in the Maritime School and in the Town Hall in Oslo, and a mural in the Security Council chamber of the United Nations in New York City.

Krohg's early paintings were primarily landscapes and portraits, but his large, expressive, flowing strokes were better suited to the monumental character of mural paintings.