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 2013, Dr. Cary Mazer, a theatre professor at the University of Pennsylvania in Philadelphia, produced a stage version of his Jewish-inspired adaptation, "Pinchas Vontz". The script was produced as a staged reading, with direction by Philadelphia theatre artist Ed Sobel. In 2018, the Liverpool Everyman Theatre staged a 'reimagining' of the play, written by Robert Farquhar and directed by Nick Bagnall, titled The Big I Am. The role of Peer Gynt at different stages of his life was played by three actors: Nathan McMullen, Liam Tobin, and Richard Bremmer. There have been a number of film adaptations including: Peer