What is Ireland famous for?

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Across
  1. 1. Before Christ
  2. 5. characterized by abundant production
  3. 8. Writer
  4. 9. By a small margin; barely
  5. 10. Certainly
  6. 12. Members of the Celtic peoples
  7. 14. In all places
  8. 15. In spite of that; nevertheless; yet
  9. 17. North African republic
  10. 18. Level, dimension
  11. 19. Resort, appeal: for help
Down
  1. 2. Making things by hand
  2. 3. To make guesses
  3. 4. Document or record library
  4. 6. Huge, limitless
  5. 7. Entertainer
  6. 11. To grow vigorously; flourish
  7. 13. From one end to the other
  8. 16. Combining, uniting, mixing influences