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Costanza Sforza of Santa Fiora (1550 – 1617) was an Italian noblewoman. The direct granddaughter of Costanza Farnese (daughter of Alessandro Farnese, later Pope Paul III),[1] she was Duchess of Sora and married Giacomo Boncompagni, Marquess of Vignola, and Duke of Sora. [citation needed]
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