A troll is a being in Nordic folklore, including Norse mythology. In Old Norse sources, beings described as trolls dwell in isolated areas of rocks, mountains, or caves, live together in small family units, and are rarely helpful to human beings.

Theodor Severin Kittelsen was a Norwegian artist. He is one of the most popular artists in Norway. Kittelsen became famous for his nature paintings, as well as for his illustrations of fairy tales and legends, especially of trolls.