"O Isis und Osiris", priest´s choir from the opera "Die Zauberflöte" ("The Magic Flute") K. 620 "O Isis und Osiris", priest´s choir from the opera "Die Zauberflöte" ("The Magic Flute") K. 620 Main opus "Die Zauberflöte" ("The Magic Flute"), Opera in two acts KV 620