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In page Grand Duchess Anna Petrovna of Russia:

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Foreign visitors to the Russian court were struck by the uncommon beauty of Anna. The dark-eyed Anna looked more like her father and was considered more level-headed and intelligent than her younger sister, the fair-haired Elizabeth. A contemporary described Anna: "She was a beautiful soul in a beautiful body ... both in appearance and in manners, she was [her father’s] complete likeness, particularly in her character and mind ... set off by her kind heart."