Isabel of Viseu

Isabel of Viseu (1459–1521) was a daughter of Infante Fernando, Duke of Viseu and his wife and cousin Infanta Beatrice, Duchess of Viseu. She was a member of the House of Aviz and later, House of Braganza.

Infanta Isabel
Duchess of Braganza
Isabel of Viseu in a c. 1645 genealogy of the Kings of Portugal (National Library of Portugal).
Beja, Portugal
DiedApril 1521
Lisbon, Portugal
SpouseFernando II, Duke of Braganza
IssueJaime, Duke of Braganza
Dinis of Portugal
HouseAviz (by birth)
Braganza (by marriage)
FatherInfante Fernando, Duke of Viseu
MotherBeatrice of Portugal
ReligionRoman Catholicism


She was the sister of Manuel I of Portugal and Leonor of Viseu. Her maternal grandparents were Infante João of Portugal and his wife Isabella of Barcelos. Her paternal grandparents were Edward of Portugal and Leonor of Aragon.

Isabel's cousin was Isabella I of Castile, wife of Ferdinand II of Aragon and mother of the English queen, Catherine of Aragon.



She married Fernando II, Duke of Braganza, a marriage that would later end in tragedy. This was Fernando's second marriage, after the death of his first wife, Leonor de Menezes. Leonor had not borne any children, so Isabel needed to deliver a son.

Isabel and Fernando had seven children:


Even at a young age, John II of Portugal was not popular among the peers of the kingdom since he was immune to external influence and appeared to despise intrigue. The nobles (including particularly Isabela's husband, the Duke of Braganza) were afraid of his future policies as king. Events proved them right.

After the official accession to the throne in 1481, John II took a series of measures to curtail the overgrown power of his aristocracy and to concentrate power on himself. Immediately, the nobles started to conspire; John II did nothing but observe. Letters of complaint and pleas to intervene were exchanged between the Duke of Braganza and Queen Isabella I of Castile. In 1483, this correspondence was intercepted by royal spies. The House of Braganza was outlawed, their lands confiscated and Isabel's husband executed in Évora.

The following year Isabel's brother was murdered by King John himself because there was word of a new conspiracy that also involved Isabel's second cousin and her father's brother in law. Isabel's family would have felt safe because her sister Leonor was married to John II, but they weren't safe at all. Many other members of Isabel's family were murdered including her elder brother Diogo, Duke of Viseu.

Later years

In 1495, John died without surviving legitimate issue and Isabel's brother succeeded him as Manuel I of Portugal. At first, Leanor was made heiress but because she was Dowager Queen and had no surviving children, the post as heiress was passed to Isabel, who in turn passed it to her eldest son Jaime, who was heir from 1495 until 1498 when Manuel's son Miguel da Paz, Prince of Portugal was born.

Isabel died in 1521, she was 62 years of age at the Lisbon Convent of the Mother of God,[1] her brother died later in the year, her sister Leonor died 4 years later. Out of their four children Jaime and Dinis survived to adulthood, Jaime later succeeded his father as Duke of Braganza.


See also


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