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In page Maria Carolina of Austria:

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Maria Carolina's dislike of her husband, however, did not get in the way of her bearing children, as her most important wifely duty was to perpetuate the dynasty. In total, Maria Carolina bore Ferdinand eighteen children within twenty-one years, from 1772 to 1793. Seven of these children survived into adulthood including his successor, Francis I, the last Holy Roman Empress, a Grand Duchess of Tuscany, the last Queen of the French, and a Princess of Asturias.[citation needed]