The origins of Greek theater can be traced back to ancient hymns called dithyrambs that were sung in honor of Dionysus. These evolved into choral performances where participants wore costumes and masks. Greek tragedies and comedies were performed in outdoor theaters with a circular orchestra space for dancing and a seating area carved into hillsides. Major playwrights included Aeschylus, Sophocles, and Euripides. Sophocles' plays like Oedipus and Antigone explored the relationship between gods and human fate through complex characters and moral dilemmas.