Aeschylus (est. 525-456 B.C.E.) was the father of Greek tragedy, whose innovations in theater included conflict directly between characters, rather than through the intermediary of the chorus. Though a highly prolific playwright of an estimated seventy to ninety plays, only seven of Aeschylus' works survive. Among the most famous are The Persians and the Oresteia trilogy: Agamemnon, The Libation Bearers, and The Eumenides.