Marie Katharine Helene Tannæs (1854–1939), was a Norwegian painter known for her landscape paintings.

[2] She studied with Carl Schøyen, Christian Wexelsen, Christian Krohg, Hans Heyerdahl, Erik Werenskiold, and Pierre Puvis de Chavannes.

[3] She exhibited her work at the Palace of Fine Arts at the 1893 World's Columbian Exposition in Chicago, Illinois.

[1] Tannæs received an honorable mention at the Exposition Universelle in Paris in 1889, a bronze medal at the 1900 Exposition Universelle in Paris, and a Silver Medal at the Panama–Pacific International Exposition in San Francisco in 1915.

[3] Tannæs died 20 February 1939 in Copenhagen, Denmark.