That depends on which cavern you mean!
It could possibly hold up to a 1,000 people.
When it first opened the Globe theatre could hold about 3,000 people.
They say that if it was completely sold out it could hold 3000 people.
as many people as you can fit haha
1500 - 3000 people
5
3000
70 people could fit in one boat
70 to 80 people could fit in a roman galley
It could held 120 people
The theatre could seat as many as 17,000 people.
The theatre could seat as many as 17,000 people.