National treasures

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Across
  1. 1. Total number of inhabitants.
  2. 3. Official spoken communication of a country.
  3. 4. Official coin of a country.
  4. 6. National symbol (green, white, and red with an eagle in the centre.
  5. 8. Principal rulers of a monarchy.
Down
  1. 1. Someone who has a job in politics.
  2. 2. Official song of a country.
  3. 5. Principal city of a country (CDMX).
  4. 7. Legal rules to obey.