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Beatriz, Duchess of Viseu

Infanta Beatrice
Duchess of Viseu
D. Beatriz de Portugal, Duquesa de Viseu (1430-1506) - Genealogia de D. Manuel Pereira, 3.º conde da Feira (1534).png
Infanta Beatriz in a 1534 miniature in the Genealogy of D. Manuel Pereira, 3rd Count of Feira
Born 13 June 1430
Died 30 September 1506
Spouse Infante Fernando, Duke of Viseu
Issue Manuel I of Portugal
Leonor of Viseu
Isabella of Viseu
House House of Aviz
Father Infante João, Lord of Reguengos
Mother Isabella of Barcelos

Infanta Beatriz of Portugal (13 June 1430 – 30 September 1506) was a Portuguese infanta, daughter of Infante João, Lord of Reguengos (fourth son of King John I of Portugal and his wife Philippa of Lancaster) and Isabella of Barcelos a daughter of Afonso I, Duke of Braganza.

Due to the Aviz dynasty marriage policy, Beatrice was 1st cousin and sister-in-law of king Afonso V of Portugal, 2nd cousin and mother-in-law of king John II of Portugal, 1st cousin and mother-in-law of Ferdinand II, 3rd Duke of Braganza and mother of king Manuel I of Portugal, playing an active role in politics during the consecutive reigns of Afonso V, John II and Manuel I.

Through her sister Isabella, wife of John II of Castile, she was an aunt of Isabella I of Castile, helping to settle both the Treaty of Alcáçovas and the Treaty of Terçarias de Moura between the Kingdom of Portugal and the Kingdom of Castile, after meeting with her niece Isabella in person.

She was also predominant in the Order of Santiago, acting as tutor for her son Diogo.

Infanta Beatrice protected and encouraged Gil Vicente, a Portuguese playwright, considered as the father of the Portuguese theatre.


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