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 Gynt represents the superior Germanic hero, struggling against implicitly Jewish "trolls". Ralph M. Engelman says, "Eckart meant his adaptation of Peer Gynt to represent a racial allegory in which the trolls and Great Boyg represented what [Otto] Weininger conceived to be the Jewish spirit." Eckart's version was one of the best attended productions of the age with more than 600 performances in Berlin alone. Eckart later helped to found the Nazi party. In 1938 German composer Werner Egk finished an opera based on the story. In 1948, the composer Harald Sæverud made a new score for the nynorsk-production at "the