How 1,000 Roman Sailors Turned the Colosseum Into Ancient Rome’s First Air-Conditioned Stadium
The Colosseum featured a massive retractable awning system called the velarium, operated by 1,000 skilled Roman sailors who could deploy canvas coverings over two-thirds of the arena. This ancient air conditioning system used sophisticated rope networks and aerodynamic design to cool 50,000 spectators during events.
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