6h

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Across
  1. 3. - Greek city-state known for its military prowess (6 letters, six)
  2. 7. - Chinese ethical and philosophical system (12 letters, twelve)
  3. 10. - Title of ancient Egyptian rulers (7 letters, seven)
  4. 12. - Ancient river valley civilization in present-day Pakistan (5 letters, five)
  5. 13. - Ancient Greek city that became Constantinople (9 letters, nine)
  6. 15. - Holy city for Judaism, Christianity, and Islam (9 letters, nine)
Down
  1. 1. - French military and political leader (8 letters, eight)
  2. 2. - Religion founded by Siddhartha Gautama (9 letters, nine)
  3. 4. - Major religion of India (8 letters, eight)
  4. 5. - Mythical creature with a lion's body and a human head (6 letters, six)
  5. 6. - Ancient Roman amphitheater (10 letters, ten)
  6. 8. - Japanese warriors of the feudal period (7 letters, seven)
  7. 9. - Carthaginian military commander (8 letters, eight)
  8. 11. - Headquarters of the Roman Catholic Church (7 letters, seven)
  9. 14. - Legendary city in Homer's "Iliad" (4 letters, four)