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 This". John Cale, Welsh musician and founder of American rock band The Velvet Underground, recorded a song "Hedda Gabler" in 1976, included originally on the 1977 EP "Animal Justice" (now a bonus track on the CD of the album "Sabotage"). He performed the song live in 1998, with Siouxsie Sioux, and also in London (5 March 2010) with a band and a 19 piece orchestra in his Paris 1919 tour. The song was covered by the British neofolk band Sol Invictus for the 1995 compilation "Im Blutfeuer" (Cthulhu Records) and later included as a bonus track on the 2011 reissue