Metropolis /(?)/

Me·trop·o·lis

Metropolis

n.
  1. The mother city; the chief city of a kingdom, state, or country.
    [Edinburgh] gray metropolis of the North.
  2. The seat, or see, of the metropolitan, or highest church dignitary. (Eccl.)
    The great metropolis and see of Rome.
  3. Any large city.