The theater of ancient Greece flourished between 550-220 BCE in the city-state of Athens. Plays were performed as part of religious festivals honoring Dionysus, with theaters built into hillsides. Tragedies and comedies were most popular, performed by 3 actors and a chorus. Plays examined human condition and fate. Choruses provided commentary through song and dance, wearing masks and costumes. Greek theater traditions like masks and staging influenced modern theater.