Tigrane, o vero L'egual impegno d'amore e di fede (Tigranes or The Equal Ties of Love and Faith) is an opera seria in three acts by the Italian composer Alessandro Scarlatti with a libretto by Domenico Lalli (loosely based on the Histories of Herodotus).
As well as the serious main plot, there are also comic scenes involving the servants Dorilla and Orcone.
To avenge his death, Tomiri has fought and defeated Ciro with the aid of Policare and Doraspe.
In return for their help, she has promised to marry one of them, but she is reluctant to come to a decision as she finds herself attracted to Tigrane, a commander in the allied army, unaware he is her son.
Ciro's daughter, Meroe, is also in love with Tigrane and arrives at Tomiri's court in disguise, bent on avenging her father.