Pyramid of skulls

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Across
  1. 3. known for/art style
  2. 4. 3 work of the artist (no spaces)
  3. 7. artist medium
  4. 8. 1 work of the artist (no spaces)
  5. 11. 5 work of the artist (no spaces) french name
  6. 12. 2 work of the artist and probably his most famous
Down
  1. 1. nationality of artist
  2. 2. 4 work of the artist (no spaces) french name
  3. 5. famous artist that took inspiration and liked his work
  4. 6. last name of the artist
  5. 9. first name of the artist
  6. 10. birth month