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 of dramatic action that was beyond the capacities of the theatre of the day; both created "a sequence of images in language and visual composition" that "became technically possible only in film." "Peer Gynt" was first performed in Christiania (now Oslo) on 24 February 1876, with original music composed by Edvard Grieg that includes some of today's most recognized classical pieces, "In the Hall of the Mountain King" and "Morning Mood". It was published in German translation in 1881, in English in 1892, and in French in 1896. The contemporary influence of the play continues into the twenty-first century. "Peer