Oslo being the first Opera House in the world to let people walk on the roof of the building. The foyer and the roof are also used for concerts as well as the three stages. Most great Norwegian authors have lived in Oslo for some period in their life. For instance, Nobel Prize-winning author Sigrid Undset grew up in Oslo, and described her life there in the autobiographical novel "Elleve år" (1934; translated as "The longest years"; New York 1971). The playwright Henrik Ibsen is probably the most famous Norwegian author. Ibsen wrote plays such as "Hedda Gabler", "Peer Gynt", "A
Peer Gynt than what is to be found in Asbjørnsen's "Norwegian Folktales" (in the section entitled 'Stories from the Mountain')." In those stories, Peer Gynt rescues the three dairy-maids from the trolls and shoots the Bøyg, who was originally a gigantic worm-shaped troll-being. Peer was known to tell tall tales of his own achievements, a trait Peer in the play inherited. The "buck-ride" story, which Peer tells his mother in the play's first scene, is also from this source, but, as Åse points out, it was originally Gudbrand Glesne from Vågå who did the tour with the reindeer stag and finally shot