La clemenza di Tito
In the meantime, however, Vitellia has heard the news about Titus's interest in Servilia and is again very jealous.  She urges Sextus to kill Titus. He agrees, singing one of the opera's most famous arias, "Parto, parto." Almost as soon as he leaves, Annius and the guard Publius arrive to take Vitellia to Titus, who has now chosen her as his empress. She is torn with feelings of guilt and worry over what she has sent Sextus to do.