About Joan, Princess of Portugal
Lived 1452 – 1490 (aged 38). Joan, Princess of Portugal was a politician and nun.
Joanna of Portugal OP (6 February 1452 – 12 May 1490; , ) was a Portuguese regent princess of the House of Aviz, daughter of King Afonso V of Portugal and his first wife, Queen Isabel of Coimbra. She served as regent during the absence of her father in 1471. In 1475 she became a cloistered nun of the Dominican Order. She is venerated in the Catholic Church with the title 'Blessed', is commemorated by a feast on May 12, and is commonly known in Portugal as Holy Princess Joan .
Early life Joanna was the second child of Afonso, but after the early death of her older brother John in 1451, she was recognized as heir presumptive and given the title of Princess of Portugal. Other children of the king were infantes. Upon the birth of her younger brother, the future John II of Portugal, in 1455, she ceased to be heir presumptive, but among the people she continued to be known as Princess Joanna.
From a young age, Joanna expressed a desire to become a nun; however, as she was second-in-line to the throne, her father did not allow it.
During his military expedition to Tangier in 1471, Joanna served as Regent of the Portuguese Kingdom.
Marriage proposals After vehemently refusing several proposals of marriage, Although she has not been canonized, in Portugal she is known as the Princess Saint Joanna.
Revival In the early 18th century, the Portuguese nobility, clergy and court had a revival in interest in the princess. During this time, the Portuguese artist Manuel Ferreira e Sousa was the most famous artist in the revival. He was contracted by various religious institutions, noblemen, and even the royal family to paint scenes from her life.
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Ancestry
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Important facts
Family & relationships
Contemporaries
People whose lives overlapped Joan, Princess of Portugal's
Frequently asked questions
Who was Joan, Princess of Portugal?
Portuguese saint (1452-1490)
When was Joan, Princess of Portugal born?
Joan, Princess of Portugal was born on 6 February 1452 in Lisbon.
When did Joan, Princess of Portugal die?
Joan, Princess of Portugal died on 12 May 1490 in Aveiro.
What was Joan, Princess of Portugal's occupation?
Joan, Princess of Portugal was a politician and nun.
What nationality was Joan, Princess of Portugal?
Joan, Princess of Portugal's recorded nationality: Kingdom of Portugal.
Sources & further reading
· Wikipedia: Joan, Princess of Portugal
· DBpedia: Joanna, Princess of Portugal
Cite this page
APA: Biography.guide. (2026). Joan, Princess of Portugal. https://biography.guide/joan-princess-of-portugal/
MLA: "Joan, Princess of Portugal." Biography.guide, https://biography.guide/joan-princess-of-portugal/.
Chicago: "Joan, Princess of Portugal." Biography.guide. https://biography.guide/joan-princess-of-portugal/.
Data last updated: 2026-09-21 · Spot an error? Report a correction.
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