Ibsen's "A Doll's House," written two years after "The Pillars of Society," became a sensation and is now widely considered his most famous play. Required reading in many secondary schools and universities, the play was highly controversial upon its release due to its sharp criticism of 19th Century marriage norms. Despite following the structure of a traditional well-made play, the play breaks convention by ending with a discussion instead of an unraveling in its final act. Although Ibsen himself denied it, "A Doll's House" is often referred to as the first true feminist play.