Theater was the most common and only (almost) way to state every situations in ther public for ancient period. That’s why we can come across many giant and small theaters in ancient sites. Across the world, we can see the same architectural site plan due to Roman affect.
As we know that masks of theater are origined from those times. They represent the basic emotions of human life. The picture above is around 2000 years old and they are one of the oldest samples of world theaters.