Clitennestra, an opera in a prelude and two acts, was the last work by Ildebrando Pizzetti.

The opera play is based on ancient Greek mythology written by Aeschylus and Sophocles.

It was premiered at La Scala in Milan on 1 March 1965, conducted by Gianandrea Gavazzeni.

[1] On his return from the Trojan war, Agamennone was murdered by his wife Clitennestra, she claims, to punish him for sacrificing their daughter Iphigenia, but in reality to be with her lover, Egisto.

Seven years later, Clitennestra was killed by her son Oreste, who had been turned away as a child and returned incognito (bringing the false news of his death) to avenge his father.