Duarte, Duke of Guimarães (1515–1540)

Duarte, Duke of Guimarães (7 October 1515 – 20 September 1540) was a Portuguese infante (prince); the sixth son of King Manuel I of Portugal and his wife Maria of Aragon.

Life
Duarte was born in Lisbon on 7 October 1515. He was tutored by André de Resende, who later wrote his biography. The Infante loved hunting and was quite a good musician.

In 1537, Duarte married Isabella of Braganza, daughter of James, Duke of Braganza, who was dowried with the Dukedom of Guimarães in her own right. After the marriage, Infante Duarte became the 4th Duke of Guimarães.

This marriage produced three children:
 * Infanta Maria of Guimarães (1538–1577), married Alessandro Farnese, Duke of Parma and Piacenza.
 * Infanta Catarina, Duchess of Braganza (1540–1614), Duchess of Braganza, married to John, 6th Duke of Braganza, she was a claimant of the throne of Portugal in 1580 (''See: 1580 Portuguese succession crisis).
 * Infante Duarte, 5th Duke of Guimarães (1541–1576)

He is buried in the Monastery of Jerónimos in Lisbon.