Poul Simon Christiansen, frequently referred to as Poul S.
Christiansen (20 October 1855, Rolfsted, Funen – 14 November 1933, Copenhagen) was a Danish painter who developed a Colourist style under Kristian Zahrtmann and as a result of his appreciation of the works of Paul Gauguin and Vincent van Gogh.
He painted landscapes and religious works, many of which became popular as reproductions.