https://mesmotsbysazz.com/2020/04/10/italy-you-beauty-stay-strong-rome-colosseum/
In continuation to my previous post have a look and the interior of the Roman Colosseum, it is undergoing a major restoration works.
One can see barracks/passageways below the ground which is open for visitors.

The seating arrangements were such that this huge Arena can hold upto 60,000 people who can watch and cheer for their favourite Gladiator fighting agaisnt all odds.
