Opened in 1915. Ran 356 performances, to about November 1915. The Blue Paradise is a musical in a prologue and two acts, with music by Edmund Eysler, Sigmund Romberg and Leo Edwards, lyrics primarily by Herbert Reynolds, and a book by Edgar Smith, based on the operetta Ein Tag im Paradies by Eysler with original text by Leo Stein and Bela Jenbach. The story is set in a Viennese cafe, where a man realizes that he cannot recapture his long lost love. Wiki link