Person:Beatrice of Portugal (1)

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Beatrice (; 7–13 February 1373 – ) was the only surviving legitimate child of King Ferdinand I of Portugal and his wife, Leonor Teles. She became Queen consort of Castile by marriage to King John I of Castile. Following her father's death without a legitimate male heir, she claimed the Portuguese throne, but lost her claim to her uncle, who became King John I of Portugal, founder of the House of Aviz.

During her early years, Beatrice was a pawn in the changing politics of foreign alliances of her father, who negotiated successive marriages for her. She would eventually marry King John I of Castile, by whom Beatrice became Queen consort of Castile. At the death of her father, Beatrice was proclaimed Queen regnant of Portugal and her mother assumed the regency in her name. Opposition to the regency, fear of the Castilian domination and loss of Portuguese independence led to a popular rebellion and civil war between the late King Ferdinand I's illegitimate brother, John of Aviz, who wrested control of the regency from the dowager queen, and the supporters of Beatrice and her husband, John I of Castile, who claimed the throne of Portugal by right of his wife. In 1385, John of Aviz was proclaimed King of Portugal, and the King of Castile was definitively defeated in the Battle of Aljubarrota, effectively ending any prospects for Beatrice and her husband to assert their rights to the Portuguese crown.

From that time, Queen Beatrice took a special interest in the welfare of the Portuguese exiles in Castile who had been faithful to her dynastic claim to the Portuguese throne. After the death of her husband she was relegated to a secondary level in the Castilian court. However, the dynastic strife continued represent a challenge to the normalization of relations between Castile and Portugal. From the second decade of the 15th century onwards, her documentary trail became scarce until she completely disappears about 1420.

1. ↑ ^1.0 1.1 Beatrice of Portugal, in Wikipedia: The Free Encyclopedia.