Artaserse is an opera (dramma per musica) in three acts composed by Johann Adolph Hasse to an Italian libretto adapted from that by Metastasio by Giovanni Boldini first shown in Venice on 11 February 1730.
For instance, at the end of the first act of the 1760 version, Mandane's accompanied recitative and aria in which she calls upon the ghost of her father, King Xerxes, has been removed.
[1] To those three versions solely by Hasse, one must also add a myriad of pasticcios which use Hasse's setting as a basis, including for instance the notable Autumn 1734 London production put together by Nicola Porpora, starring Farinelli in arias written by Riccardo Broschi, but also, earlier that same year, a production for the Venice Carnival including additional music by Galuppi, starring both Farinelli and Caffarelli!
And so, he accuses Dario, Serses I's eldest son and older brother of Artaserse, of the regicide and persuades the latter to avenge the crime.
After Dario's demise, the only thing left wanting is now the death of Artaserse, which Artabano has plotted, but his plans are delayed by a succession of various incidents and in the meantime the treason is revealed.