Hans Olaf Halvor Heyerdahl (8 July 1857 – 10 October 1913) was a Norwegian Realist painter. His work was characterized by naturalism and focused largely on portraits and landscape paintings.[1][2]
^Trond Aslaksby (20 February 2017). "Hans Heyerdahl". Norsk kunstnerleksikon. Retrieved December 1, 2017.