Iberian Union
The Iberian Union
The Iberian Union was a political union between the Kingdom of Spain and the Kingdom of Portugal under the rule of the Habsburg dynasty. This period, spanning from 1580 to 1640, was characterized by the unification of these two major Iberian Peninsula kingdoms, along with their extensive overseas possessions, under a single monarch.
Historical Context
The Iberian Union was initiated when Philip II of Spain succeeded to the Portuguese throne following the death of King Sebastian of Portugal and the subsequent demise of the elderly Cardinal Henry, who had served as the interim king. The union was formalized at the Cortes of Tomar in 1581, where Philip II was recognized as King Philip I of Portugal, thus establishing a personal union of the crowns.
Structure of the Union
Despite the personal union, the political systems and institutions of Spain and Portugal remained distinct and autonomous. Each kingdom retained its own set of laws, institutions, and administrative structures. For instance, the Leyes de extranjería, or alien laws, dictated that a citizen of one kingdom was considered a foreigner in another.
Global Reach
During the Iberian Union, the combined Spanish and Portuguese empires formed the most extensive empire of the early modern era. Their territories spanned across continents, including lands in South America, Africa, Asia, and Oceania. This period saw the blending of both empires' vast colonial networks, enhancing trade and territorial expansion.
Conflicts and Challenges
The union was not without its challenges. The diversion of Portuguese resources to support the Habsburg monarchy's efforts in the Thirty Years' War strained relations within the union. Additionally, Portugal's economic dependency on its colonies, such as India and Brazil, grew during this period.
The union also faced external threats, notably from the Dutch Republic, which disrupted Iberian trade routes and sought to establish its own colonial empire. The combined Iberian forces, however, succeeded in maintaining control over key territories such as Brazil.
The End of the Union
The Iberian Union ended in 1640 when Portugal revolted against Spanish rule. The Portuguese Restoration War culminated in the Treaty of Lisbon, which recognized John IV of Portugal as the legitimate King of Portugal, thereby restoring Portuguese independence.