Pax may refer to:

  • the Latin word for "peace" or "treaty":
    • Pax (mythology), the Roman goddess of peace
    • Pax Romana or Pax Augusta, a period of relative peace and stability in the Roman Empire (see also Ara Pacis, the Augustan Altar of Peace)
    • List of periods of regional peace, the word "pax" together with the Latin name of an empire or nation, used to refer to a period of peace or at least stability

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