Quiz on my face

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Across
  1. 5. teacher of aristotle (5)
  2. 6. joaquin phoenix / strangled (8)
  3. 9. reigning royal monarch (7)
  4. 11. ancient mesoamerican civilisation (5)
  5. 12. author of perisan expedition (8)
  6. 15. hurt joint / navajo (7,4)
  7. 17. famous prison (8)
  8. 19. _ Lecter / _ Buress (8)
  9. 20. peruvian landmark (5,6)
  10. 22. historic region between euphrates and tigris rivers (11)
  11. 23. duke of _ / beef pastry (10)
  12. 25. sedentary cow (6,4)
  13. 26. boney m. song (8)
Down
  1. 1. approximately (5)
  2. 2. current geological epoch (8)
  3. 3. war of the _ (5)
  4. 4. istanbul, formerly _ (14)
  5. 7. the maid of orleans (4,2,3)
  6. 8. _ H. oswald / Robert E. _ (3)
  7. 10. survey of england by william the conqueror (8)
  8. 13. soviet leader / "tear down this wall" (8)
  9. 14. famous ww2 battle / stick out (5)
  10. 16. french puppet state 1940 - 1944 (5)
  11. 18. surpass / 45th president (5)
  12. 21. Chronological historic record (5)
  13. 24. last prince of wales (7)