5Ghosts is a play by the Norwegian playwright Henrik Ibsen. It was written in 1881 and first staged in 1882 in Chicago, Illinois, in a production by a Danish company on tour. Like many of Ibsen's plays, Ghosts is a scathing commentary on 19th-century morality. Because of its subject matter, which includes religion, venereal disease, incest and euthanasia, it immediately generated strong controversy and negative criticism. Since then the play has fared better, and is considered a "great play" that historically holds a position of "immense importance".