other · Iberia
Iberian Union
Origins
King Sebastian of Portugal died without heirs at Alcácer Quibir in Morocco in 1578, and his successor, the elderly Cardinal Henry, died in 1580. Philip II of Spain pressed his claim, won the Battle of Alcântara and was recognised as Philip I of Portugal by the Cortes of Tomar in 1581.
Rule and society
It was a personal union: Portugal kept its own laws, Cortes, currency and colonial administration, governed by a viceroy and the Council of Portugal. But union drew Portugal into Spain's wars, and the Dutch attacked Portuguese Brazil, Africa and Asia. The Count-Duke of Olivares's plans for tax and military integration caused growing resentment.
Decline and legacy
On 1 December 1640 Portuguese nobles rose in Lisbon and proclaimed the Duke of Braganza as John IV. The Restoration War ended with Spanish recognition of Portuguese independence in the Treaty of Lisbon of 1668.
On the connections map
Open the full map →Connections (5)
- Kingdom of Portugal was part of Iberian Union1580 CE – 1640 CE
- Iberian Union in personal union with Habsburg Spain1580 CE – 1640 CE
- Iberian Union in personal union with Kingdom of Portugal1580 CE – 1640 CE
- Iberian Union was part of Spanish Empire1580 CE – 1640 CE
- Iberian Union was part of Portuguese Empire1580 CE – 1640 CE
Cite this page
- APA
- The Epoch Institute. (2026). Iberian Union. In The Epoch Institute States Register. https://the-epoch-institute.org/state/iberian-union
- MLA
- “Iberian Union.” The Epoch Institute States Register, The Epoch Institute, 2026, https://the-epoch-institute.org/state/iberian-union. Accessed .
- Chicago
- The Epoch Institute. “Iberian Union.” The Epoch Institute States Register. 2026. https://the-epoch-institute.org/state/iberian-union.
- Harvard
- The Epoch Institute (2026) ‘Iberian Union’, The Epoch Institute States Register. Available at: https://the-epoch-institute.org/state/iberian-union (Accessed: ).
Last reviewed October 2026Random state ↻