This is the largest but not the only amphitheatre of the Roman Empire (there were about 250 [1]; I saw one in El Jam, Tunisia).
It was built in 80 AD.ISO 450, 50mm, f/1.4, 1/80s.
The Colosseum is amazing. Unfortunately, two thirds have been destroyed as a result of both plunder and natural disasters. [1]ISO 1400, 50mm, f/1.4, 1/80s.
The hypogeum of the Colosseum. The architect of the Colosseum is unknown, but we do know that the structure is a masterpiece
of engineering. Some of the foundations are 12-13 metres deep. [1]
When the Colosseum opened, there was a sea-fight staged there in about one metre of water - at that time the amphitheatre
had no basement that you can see in this picture.ISO 200, 11mm, f/2.8, 1/640s.
There was an inner fence on the arena to ensure that the action was in everyone's view (the gladiators couldn't
get too close to the walls surrounding the arena). [1]
There could be even 50,000 spectators, but most were only given 40cm wide seats and 70cm of legroom.ISO 200, 11mm, f/2.8, 1/500s.
