Crossword Genius

First city to reach a population of one million people, in the second century B.C. (4)

Ross

I believe the answer is:

rome

(Other definitions for rome that I've seen before include "All roads lead to it" , "When there, do as the native do" , "Italian city" , "Italian capital (where one Ac died)" , "church" .)

I've seen this clue in The New York Times.
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