Built 72 AD, It is the largest ancient amphitheatre ever built, and is the largest standing amphitheatre in the world.
The Colosseum features 800 arched entrances on each of its three main levels, totaling 240 exterior arches.
These 80 ground-level arches (76 numbered for the public, 4 for VIPs/gladiators) enabled 50,000+ spectators to enter or exit within 15 minutes, making it a masterclass in ancient engineering.