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https://indictales.com/2017/12/10/excavations-at-pataliputra-patna-have-unveiled-a-city-that-was-twice-as-large-as-contemporary-rome-the-worlds-largest-city-of-its-time/
Excavations at Pataliputra (Patna) have unveiled a city that was twice as large as contemporary Rome, the world's largest city of its time