It arose from the religious festivals in honor of the Greek gods.
I went through many changes, they added a second and third act.
The god, Dionysus was honored with a festival called: "City Dionisia" where the image of Dionysus was paraded on a boat accompanied by flute players and musicians.
His main genres were, tragedy and comedy.
Fifty men or young people participated in the parade.
As time passed, the theater expanded reaching other cultures and other cities.
Only the privileged classes could enjoy the theater.