Costanza Sforza, duchess of Sora
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Costanza Sforza of Santa Fiora (Sora
Sora, Italy
Sora is a city and comune of Lazio, Italy, in the province of Frosinone. It is built in a plain on the banks of the Liri. This part of the valley is the seat of some important manufactures, especially of paper-mills....

, 1550 – 1617) was an Italian noblewoman. The direct granddaughter of Costanza Farnese
Costanza Farnese
Costanza Farnese was a daughter of Alessandro Farnese and Silvia Ruffini, born before her father became Pope Paul III. Her siblings were Pier Luigi, Paul and Ranuccio. Costanza's own children included Guido Ascanio and her grandchildren included Costanza Sforza....

 (daughter of Alessandro Farnese
Pope Paul III
Pope Paul III , born Alessandro Farnese, was Pope of the Roman Catholic Church from 1534 to his death in 1549. He came to the papal throne in an era following the sack of Rome in 1527 and rife with uncertainties in the Catholic Church following the Protestant Reformation...

, later Pope Paul III), she was duchess of Sora
Duchy of Sora
The Duchy of Sora was a semi-independent state in Italy, created in 1443 by King Alfonso I of Naples and dissolved in 1796. It occupied the south-eastern part of what is today Lazio, bordering what is now Abruzzo...

 and married Giacomo Boncompagni
Giacomo Boncompagni
Giacomo Boncompagni was an Italian feudal lord of the 16th century, the illegitimate son of Pope Gregory XIII . He was also Duke of Sora, Aquino, Arce and Arpino, and Marquess of Vignola.A member of the Boncompagni family, he was a patron of arts and culture...

, marquess of Vignola and duke of Sora.
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