Solution:'Qresteia' a trilogy of tragic drama's by the ancient Greek dramatist, Aeschylus. It is his last work and the only complete trilogy of Greek dramas that has survived.
The 'Qresteia' tells the story of the house of Atreus. Agamemnon, Choephoroe and Eumenides constitutes the trilogy Qresteia.
Agamemnon : The first play, Agamemnon, portrays the victorious return of that king from the Trojan war and his murder by his wife - Clytemnestra and her lover Aegisthus.
Choephoroe : The second play - Choephoroe takes the real object its title from the Chorus of women servants who come to pour propitiatory offerings at the tomb of the murdered Agamemnon. It details the revenge of Agamemnon's daughter Electra and his son, Orestes.
Eumenides : The third play, Eumenides opens at the shrine of Apollo at Delphi, where Orestes has taken sanctuary from the furies. At the command of the Delphic oracle, Orestes journies to Athens to stand trial for his matricide.