Aria of Cleopatra from the opera "Giulio Cesare in Egitto" ("Julius Caesar in Egypt") HWV 17 Aria of Cleopatra from the opera "Giulio Cesare in Egitto" ("Julius Caesar in Egypt") HWV 17 Main opus "Giulio Cesare in Egitto" ("Julius Caesar in Egypt"), opera in 3 acts, libretto by Nicola Haym HWV 17