Carsten Marensius Carlsen (5 June 1892 – 28 August 1961) was a Norwegian pianist and composer.
[1] Carsten Marensius Carlsen was born in Oslo, Norway.
[2] He was educated at the Oslo Conservatory of Music from 1909 to 1913, where he studied with Gustav Fredrik Lange (1861–1939) and Per Winge (1858–1935).
He was awarded a state composer scholarship to study in Paris from 1921 to 1923.
He worked at the National Theatre of Norway from 1938 to 1941 followed by the Carl Johan Theater from 1941 to 1945.