Erwartung, ehr VAHR toong, is a tragic opera in one act by the Austrian composer Arnold Schoenberg (see Schoenberg, Arnold). Its title is the German word for expectation or suspense. The libretto (text), in German, was written by the poet Marie Pappenheim. Although Schoenberg composed Erwartung in 1909, it remained unheard for 15 years. It received its first performance in Prague (now the capital of the Czech Republic) on June 6, 1924.