Ghosts (original Danish title: Gengangere) 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.