"In diesen heil'gen Hallen", Aria of Sarastro from the opera "Die Zauberflöte" ("The Magic Flute") K. 620 "In diesen heil'gen Hallen", Aria of Sarastro from the opera "Die Zauberflöte" ("The Magic Flute") K. 620 Main opus "Die Zauberflöte" ("The Magic Flute"), Opera in two acts KV 620