Composers such as Wolfgang Amadeus Mozart used Metastasio's text and set it to music individually, in the form of concert arias.
Mozart's settings include: The Thracian king Demofonte asks the oracle of Apollo how long the practice of the annual sacrifice of a virgin will continue.
Timante's younger brother Cherinto is accompanying her to the kingdom of Thrace, however he falls in love with her.
Meeting Creusa, Timante admits that he can't marry her, but does not explain why.
The marriage of Timante and Dircea becomes legal, and Cherinto is the real crown prince and can marry Creusa.