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"When her mother Isabella of Naples died in 1524, Bona succeeded to the titles Duchess of Bari and Princess of Rossano. She also became the holder of the Brienne claim to the title of King of Jerusalem." http://en.wikipedia.org/wiki/Bona_Sforza

"Isabella di Aragona, princess of Naples and widow of the Duke of Milan Gian Galeazzo Sforza, enlarged the castle, which she made her residence, 1499–1524. After the death of Bona Sforza, Queen of Poland, Bari came to be included in the Kingdom of Naples and its history contracted to a local one, as malaria became endemic in the region." http://en.wikipedia.org/wiki/Bari

"Passing to the Sforza, and thus to Sigismund of Poland, it [Rossano] was united in 1558 to the crown of Naples by Philip II of Spain in virtue of a doubtful will by Bona Sforza, queen of Poland in favor of Giovanni Lorenzo Pappacoda. Under Isabella of Naples and Bona, the town had been a centre of literary culture; but under the Spaniards it declined." http://en.wikipedia.org/wiki/Rossano

"Hugh, Count of Brienne claimed the regency of Jerusalem (and, indirectly, a place in the succession) in 1264 as senior heir of Hugh I of Cyprus and Alice of Jerusalem, being the son of their eldest daughter, but was passed over by the Haute Cour in favor of his cousin Hugh III of Cyprus. This claim fell to his son Walter V of Brienne and his descendants. They are the heirs-general of Queen Isabella of Jerusalem, and thus of the line founded by King Baldwin II." http://en.wikipedia.org/wiki/Brienne_claim_to_the_Kingdom_of_Jerusalem

Cybrarian's question, What means "doubtful will?" [citation needed]

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