Iberian Union

Quick Facts: Who was Iberian Union?

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Iberian Union

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The period (1580–1640) when Spain incorporated Portugal, creating a vast Iberian empire.

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Origins & Early Life

The Iberian Union, or the Hispanic Monarchy, describes the period from 1580 to 1640 in which the Monarchy of Spain under the Habsburg dynasty, then the personal union of the crowns of Castile and Aragon, brought in personal union also the Kingdom of Portugal. It incorporated the entire Iberian Peninsula, except Andorra and French territory, as well as Portuguese and Spanish overseas possessions, under the Spanish Habsburg monarchs Philip II, Philip III, and Philip IV. The union began after the Portuguese succession crisis of 1580 and the ensuing War of the Portuguese Succession, and lasted until the Portuguese Restoration War, during which the House of Braganza was established as Portugal's new ruling dynasty with the acclamation of John IV as the new king of Portugal. As a personal union, the Kingdom of Portugal, the Crown of Castile and the states of the Crown of Aragon remained independent states, sharing only a single monarch. The kings from the Spanish branch of the House of Habsburg were the only element that connected the multiple kingdoms and territories, ruled by the six separate government councils of Castile, Aragon, Portugal, Italy, Flanders-Burgundy, and the Indies.

Pivotal Works & Achievements

For periods, Portugal maintained a viceroy, appointed by the king, although the turnover was often rapid; in the 60 years of the Union, the country had 13 viceroys and four regency councils (see List of viceroys of Portugal). Similar viceroys were appointed in Aragon, Catalonia, Valencia and other kingdoms of the Union. The governments, institutions, and legal traditions of each kingdom remained independent of one another. Alien laws (Leyes de extranjería) determined that a national of one kingdom was a foreigner in all other kingdoms. Possessing territories in all known continents of the time, the Iberian Union was the most wide-spread empire of the early modern era.

Enduring Legacy & Impact

The Union led to Portugal's involvement in the Dutch Revolt against Spain. The Dutch Republic in turn saw the union as a justification to start targeting Portuguese colonies and would weaken Portugal's overseas empire in the Orient. The unification of the peninsula had long been a goal of the region's monarchs with the intent of restoring the Visigothic monarchy. Sancho III of Navarre and Alfonso VII of León and Castile had both taken the title Imperator totius Hispaniae, meaning "Emperor of All Hispania". There were many attempts to unite the different kingdoms after Alfonso VII's death in 1109, especially through a policy of intermarriage.

Chronological Milestones & Life Events

1. 1109: 1109 Milestone — There were many attempts to unite the different kingdoms after Alfonso VII's death in 1109, especially through a policy of intermarriage.
2. 1580: 1580 Milestone — The Iberian Union, or the Hispanic Monarchy, describes the period from 1580 to 1640 in which the Monarchy of Spain under the Habsburg dynasty, then the personal union of the crowns of Castile and Aragon, brought in personal union also the Kingdom of Portugal.

Historical Fact-Check Quiz: Iberian Union

True or False: “The Iberian Union was established solely through the military conquest of Portugal by Philip II.”

Answer (FALSE ❌): While military action was key, the union followed a complex succession crisis after the death of King Sebastian in 1578.

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• Barbara Palmer, 1st Duchess of Cleveland — Historical peer (Born in 1640) (1640): Notorious English royal mistress and Duchess of Cleveland, famed for her connection to Charles II.
• Afonso I of Portugal — Historical peer (Born in 1109) (1109): The first King of Portugal, founder of the independent Portuguese Kingdom.
• Alfonso VI of León and Castile — Historical peer (Died in 1109) (1109): Iberian King who expanded León and Castile, conquering Toledo and resisting Almoravids.

Frequently Asked Questions about Iberian Union