In 1804 , she learned that Napoléon I , whom she had admired , had had her son , Louis Antoine , Duke of Enghien , kidnapped , and executed by firing squad in the moat of the Château de Vincennes .
In 1804 , she learned that Napoléon I , whom she admired , had had her only son , Louis Antoine , Duke of Enghien , kidnapped , and executed by firing squad in the moat of the Château de Vincennes .