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
Hedda Gabler party and reveals that he found the complete manuscript (the only copy) of Eilert's great work, which the latter lost while drunk. George is then called away to his aunt's house, leaving the manuscript in Hedda's possession. When Eilert next sees Hedda and Thea, he tells them that he has deliberately destroyed the manuscript. Thea is mortified, and it is revealed that it was the joint work of Eilert and herself. Hedda says nothing to contradict Eilert or to reassure Thea. After Thea has left, Hedda encourages Eilert to commit suicide, giving him a pistol that had belonged to her