Difficult Capital Crossword Puzzle

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Across
  1. 4. Capital of a southern South-American country and the birthplace for the tango dance.
  2. 7. Mythology capital of the world and location of the Acropolis
  3. 9. East Asian and beauty capital of the world.
  4. 11. One of three capitals in the country that is home to the legislative branch of government
Down
  1. 1. East European capital known for having a treaty named after it (mid-1950s)
  2. 2. City containing a very famous wall that splits the city in half
  3. 3. Ancient North African city known for its Phoenician historical sites
  4. 5. Famous city know for its volcanic hills, also known as Tāmaki Makaurau
  5. 6. Very populated capital that mainly lies in a massive valley
  6. 8. Northern capital know for scenic views and Nordic cuisine
  7. 10. Bilingual capital known for "Parliament Hill"