Pickens crossword

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Across
  1. 3. established as greatest center of Muslim learning
  2. 4. makes handcrafted items
  3. 8. somebody who sells/trades goods
  4. 13. Religious text of Islam
  5. 14. head physician at baghdads chief hospital
  6. 17. main language of Islam
  7. 19. contributed to the development of algebra
  8. 20. Organized massive irrigation projects
Down
  1. 1. moving in the social class
  2. 2. a major trade route
  3. 5. introduced the term algebra
  4. 6. the art of producing beautiful handwriting
  5. 7. established the principles of history and economics
  6. 9. mostly shilled artisans
  7. 10. created and passed down without writing
  8. 11. a messenger of allah
  9. 12. main method of transportation for the Muslim trade network
  10. 15. allah is there God
  11. 16. Served as a community center for the Muslim people
  12. 18. wrote the canon of medicine