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Theresa of Portugal, Queen of León

Theresa of Portugal
D. Teresa de Portugal, Rainha de Leão - The Portuguese Genealogy (Genealogia dos Reis de Portugal).png
Theresa in Genealogy of the Kings of Portugal (António de Holanda, 1530–1534)
Queen consort of León
Kingdom of Portugal
Died18 June 1250(1250-06-18) (aged 71)
Lorvão Abbey, Kingdom of Portugal
Lorvão Abbey, Portugal
Alfonso IX of León
(m. 1191; annulled 1196)
IssueInfanta Sancha
Infanta Dulce
Infante Ferdinand
HousePortuguese House of Burgundy
FatherSancho I of Portugal
MotherDulce of Aragon
ReligionRoman Catholicism

Theresa of Portugal (European Portuguese: [tɨˈɾezɐ, tɨˈɾezɤ]; 1176 – 18 June 1250) was Queen of Léon as the first wife of King Alfonso IX of León. She was born the oldest daughter of Sancho I of Portugal and Dulce of Aragon. When her marriage was annulled because of consanguinity, she retired to a convent. She was beatified in 1705.


Theresa was the mother to three of Alfonso's children—two daughters and a son, Ferdinand, who was the heir of the kingdom until his death in 1214—but when her marriage to Alfonso was declared invalid because they were first cousins, she returned to Kingdom of Portugal and lived in the Monastery of Lorvão, formerly under the Benedictine rule, which she converted into a Cistercian convent, with over 300 nuns.

In 1230, Alfonso died after having several children with a second wife, Queen Berengaria of Castile. This second marriage was also annulled because Berengaria was Alfonso's first cousin once removed. With two invalidated marriages, there was dispute among the children as to who would inherit the throne. Theresa stepped in and allowed Ferdinand III of Castile, Berengaria's eldest son, to take the throne of León. After the succession dispute, Theresa returned to Lorvão and finally took her convent vows after years of living as a nun. She died in the convent on 18 June 1250, of natural causes.[1][2]

On 13 December 1705 Theresa was beatified by Pope Clement XI's papal bull Sollicitudo Pastoralis Offici, along with her sister Sancha of Portugal. Her Catholic feast day is 17 June.[3]



  1. ^ "KINGS of CASTILE & LEÓN". Retrieved 2018-07-03.
  2. ^ "PORTUGAL". Retrieved 2018-07-03.
  3. ^ Online, Catholic. "St. Teresa of Portugal - Saints & Angels - Catholic Online". Catholic Online. Retrieved 2018-07-03.
Preceded by
Urraca López de Haro
Queen consort of León
Succeeded by
Berenguela of Castile