Isabella of Portugal (1397–1471)

Isabella of Portugal
Isabel of Portugal, by Rogier van der Weyden.
Duchess consort of Burgundy
Tenure	7 January 1430 – 15 July 1467
Born	21 February 1397 Évora, Portugal
Died	17 December 1471(1471-12-17) (aged 74) Dijon, Burgundy
Spouse	Philip the Good
Issue	Charles the Bold
House	Aviz
Father	John I of Portugal
Mother	Philippa of Lancaster

Isabella of Portugal (22 February 1397 – 17 December 1471) was Duchess of Burgundy as the third wife of Duke Philip the Good. Born a Portuguese infanta of the House of Aviz, Isabella was the only surviving daughter of King John I of Portugal and his wife Philippa of Lancaster. Her son by Philip was Charles the Bold, the last Valois Duke of Burgundy. Isabella was the regent of the Burgundian Low Countries during the absence of her spouse in 1432 and in 1441–1443. She served as her husband's representative in negotiations with England regarding trade relations in 1439 and those with the rebellious cities of Holland in 1444.

Isabella was born to John I of Portugal and Philippa of Lancaster, who had six children survive infancy. Born in 1397 in Évora, and raised in the Portuguese court in Lisbon, Isabella was the fourth child and only daughter to survive to adulthood. Phillippa instilled in all her children, including her daughter, a sense of duty, faith and belief in education. Isabella was an avid reader and held an interest in politics. Her father ensured that she was given a good understanding of politics, joining her brothers in their instructions in affairs of state and she became proficient in Latin, French, English and Italian during her studies with the princes. She was fond of riding and hunting with her brothers.

In 1415 Isabella received an offer of marriage from her cousin Henry V of England, an effort for England to form closer links with Portugal against France. The negotiations failed and Isabella remained unmarried. Also in 1415 she grieved at the death of her mother on 19 June, with whom she had a close relationship.

At age of 30 Isabella was still unmarried when the Burgundian house of Valois provided her with an offer of marriage in 1428. The reigning Duke of Burgundy, Philip the Good, had already been widowed twice - by Michelle of Valois and Bonne of Artois. Neither marriage left surviving issue. For his third wife, Philip was anxious to seek a candidate from England or a nation allied to England, since he wanted to secure his alliance with England further. Isabella was attractive to Philip as a potential consort being well-bred, shrewd and accomplished.