João Manuel, Prince of Portugal

Dom João Manuel, Hereditary Prince of Portugal (Portuguese pronunciation: [ʒuˈɐ̃w mɐnuˈɛl]) (3 June 1537 – 2 January 1554) was a Portuguese infante (prince), the eighth child of King John III of Portugal by his wife Catherine of Austria, daughter of Philip I of Castile and Joanna of Castile. As the heir to the throne he was styled Prince of Portugal.

Joam Manoell
Hereditary Prince of Portugal
João, Prince of Portugal; Antonis Mor, 1552
Born3 June 1537
Royal Palace of Évora, Évora
Died2 January 1554(1554-01-02) (aged 16)
Ribeira Palace, Lisbon
Burial
Jerónimos Monastery
Spouse
​
(m. 1552)​
IssueSebastian I of Portugal
HouseAviz-Beja
FatherJohn III of Portugal
MotherCatherine of Austria
ReligionRoman Catholicism

Early life
Portrait of Prince João Manuel; Hieronymus Cock, c. 1550-1554.

João Manuel was born on 3 June 1537 in the Royal Palace of Évora and became the heir to the throne of Portugal in 1539. He survived his four older brothers who died in childhood but was a sickly teenager. The successive inter-marriages between the houses of Spain and Portugal are believed to have some responsibility for his ill health.

On 11 January 1552, he married Princess Joanna of Spain, his first double-cousin, through both paternal and maternal line, daughter of his paternal aunt Isabella of Portugal and of his maternal uncle, Emperor Charles V.

Death

João Manuel died of what the sources refer to as consumption, which may refer to tuberculosis, on 2 January 1554, but some historians believe his death occurred as a result of diabetes, a disease he may have inherited from his maternal grandfather, Philip I. Eighteen days later, a posthumous son was born from his marriage: the future King Sebastian I of Portugal.

Ancestry

References
  1. Stephens, Henry Morse (1903). The Story of Portugal. G.P. Putnam's Sons. pp. 139, 279. ISBN 9780722224731. Retrieved 17 September 2018.
  2. Liss, Peggy K. (10 November 2015). Isabel the Queen: Life and Times. University of Pennsylvania Press. p. 11. ISBN 9780812293203.
  3. Wurzbach, Constantin, von, ed. (1861). "Habsburg, Philipp I. der Schöne von Oesterreich" . Biographisches Lexikon des Kaiserthums Oesterreich [Biographical Encyclopedia of the Austrian Empire] (in German). Vol. 7. p. 112 – via Wikisource.{{citation}}: CS1 maint: multiple names: editors list (link)
  4. Chisholm, Hugh, ed. (1911). "Emanuel I." . Encyclopædia Britannica. Vol. 9 (11th ed.). Cambridge University Press.
  5. Chisholm, Hugh, ed. (1911). "Joanna" . Encyclopædia Britannica. Vol. 15 (11th ed.). Cambridge University Press.
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