The Greeks were the inventors of two types of plays, tragedies, and comedies. Tragedy was invented in534 BC, and comedy was invented in 486 BC. Another name for tragedy is Thespis. Both of these Genres were important to Athenians because they were performed several times a year at religious and agricultural festivals. Only works of four playwrights have survived until this day. Aeschylus, writer of the tragedies "Agamemnon", "Seven Against" Thebes, and "Prometheus". Eurpidies, who wrote the tragedies, "Heracles", "Medea", and "The Trojan Women". Sophcles, who's famous tragedies are "Oedipus Rex", "Antigone", "Electra". Aristophanes was a writer of comedy whose plays consisted of "Lysistrata", "The Birds", and "The Frogs". Aristophanes has the sole reverences to Greek comedy that have survived this century. These four playwrights have been given credit as being some of the best ever. They have won many prizes in world dramatic competition.