Who am I ?

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Across
  1. 4. I was beheaded during French revolution
  2. 5. I am the French national anthem
  3. 7. I am a museum in Paris
  4. 8. I am a French umpressionist painter
Down
  1. 1. I am the Sun King
  2. 2. ( am a biologist
  3. 3. I am a famous designer
  4. 6. I am a color of the French flag