Das Herz is a German-language opera by Hans Pfitzner to a libretto by Hans Mahner-Mons.Margaret Ross Griffel Operas in German: A Dictionary 2018 p219 "HERZ, DAS (The Heart), drama for music in three acts by Hans Pfitzner; libretto (Ger) by Hans Mahner-Mons. It received concurrent premieres in 1930 in Berlin and Munich. Recordings Das Herz - Andre Wenhold (baritone), Volker Horn (tenor), Roberta Cunningham (soprano), Beth Johanning (soprano), Gerhard Stephan (bass) Thuringian Landestheater Chorus, Thuringian Symphony Orchestra Rolf Reuter 2CD Marco Polo 1993 References