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
Two River Theater Cookery, Peer Gynt, The House of Blue Leaves" 2000/2001 "Arms and the Man, La Bệte, American Buffalo, The Heiress" 1999/2000 "Blood Wedding, Uncle Vanya, The Fantasticks, Light Up the Sky" 1998/1999 "The Real Thing, Thieves’ Carnival, Hedda Gabler, Noises Off" 1997/1998 "The Dining Room, The Glass Menagerie, Machinal, The Importance of Being Earnest" 1996/1997 "A View from the Bridge, Reckless, Betrayal, Blithe Spirit" 1995/1996 "Nora, The Illusion, The Curse of the Starving Class, All in the Timing" 1994/1995 "The Cocktail Hour, The Heidi Chronicles, Misalliance" "ReEntry" (January 2009), "Orestes" (March 2010), "Seven Homeless Mammoths Wander New England" (October 2011), "