History & Civilizations
How many people lived in the city of ancient Rome at its peak in the 2nd century AD?
Answer
1,000,000 people
No European city would match ancient Rome's million residents again until London around 1800 — some 1,600 years later. Keeping Rome running required eleven aqueducts delivering hundreds of millions of liters of water a day.
Source: Encyclopaedia Britannica
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