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No Marie Antoinette did not cause the French Revolution.
I believe you mean: What was Marie Antoinette executed by?
Well, sadly she was executed by the guillotine :)
Marie Antoinette's importance in France was that she became the queen, but was later beheaded because she was disliked.
Marie Antoinette, an Austrian archduchess.Marie Antoinette.
Marie Antoinette