Diogo, Duke of Viseu
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Infante Diogo of Viseu (1450–1484) was the second son of Ferdinand, Duke of Viseu, and his wife Beatriz, Duchess of Viseu.
History
Diogo's father, uncle of King John II, was believed to be the richest man in Portugal, having accumulated two duchies and numerous lordships.Template:SfnTemplate:Sfn In 1472, when his older brother John, Duke of Viseu, died without issue, Diogo inherited his titles and estates as Duke of Viseu and Duke of Beja.
Diogo was a popular personality at the court of his cousin King John II, and together with Duke Fernando II of Braganza, he was the main target of King John's centralization policies.Template:Sfn John II sought to limit the power of the upper nobility, which had increased greatly during the reign of John's father Afonso V of Portugal.Template:SfnTemplate:SfnTemplate:Sfn
Duke Fernando II of Braganza, husband of Isabella of Viseu, the sister-in-law of King John II of Portugal and Diogo's sister, was the first victim of John's efforts against the Portuguese nobility. In 1483, he was imprisoned, tried and executed in Évora.Template:SfnTemplate:Sfn
In 1484, Diogo was accused of being the center of a conspiracy against the crown and was stabbed to death by the king himself.Template:SfnTemplate:SfnTemplate:Sfn
After the execution, King John II called the duke's younger brother, Infante Manuel of Viseu, and showed him his brother's body. He promised Manuel that he would consider him his own son. At that moment, Manuel inherited his brother Diogo's titles and estates.Template:SfnTemplate:Sfn
Duke Diogo never married, but when he was quite young he visited the Crown of Castile, where he had a love affair with Doña Leonor de Sotomaior y Portugal (great-granddaughter of King Pedro I of Portugal). With her he had a natural son, Afonso de Portugal. King Manuel I of Portugal granted this nephew, Afonso de Portugal, the position of 8th Constable of Portugal. Afonso's daughter and heir, Beatrice of Lara, married the 3rd Marquis of Vila Real.Template:Sfn
See also
References
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Bibliography
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External links
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