Iberian Union

The Iberian Union, also called the Hispanic Monarchy, was a unique period in history. It lasted from 1580 to 1640. During this time, the Habsburg monarchs of Spain ruled over the Kingdom of Portugal. This arrangement is known as a personal union. In a personal union, different kingdoms share the same monarch but remain separate states. They do not merge into one single country. Instead, they keep their own laws, traditions, and governments. This union brought together almost the entire Iberian Peninsula, except for Andorra. It also joined the vast overseas possessions of both Spain and Portugal under one crown.

The union was born from a major succession crisis in Portugal. In 1578, a young king named Sebastian died during the Battle of Alcácer Quibir. His death left no direct heir to the throne. This created a struggle between three main claimants. One was Philip II, the King of Spain. Another was António, the Prior of Crato. The third was Infanta Catarina, the Duchess of Braganza. Philip II eventually marched into Portugal to claim his right. His forces defeated the troops of the Prior of Crato at the Battle of Alcântara. In 1581, the Cortes of Tomar officially recognized Philip II as the king of Portugal.

To manage such a massive empire, the Habsburg kings used a complex system. This is often called a poly-synodical system. It relied on several different groups known as councils, or "consejos." These councils provided specialized advice to the monarch. The king stayed in Madrid, which served as the permanent capital. One important group was the Council of State, or "Consejo de Estado." This council handled major decisions regarding the defense and organization of the entire monarchy. Other councils focused on specific regions. There were councils for Castile, Aragon, Navarre, Italy, the Indies, and Flanders-Burgundy.

The Council of Portugal was specifically created in 1582 to manage Portuguese affairs. It consisted of a president and several counselors. This council represented the Portuguese Cortes in matters of the economy and justice. Any major royal decision regarding Portugal had to be discussed with this council first. The council's work was then sent to the chancellery in Lisbon to be executed. While the king ruled from Madrid, he maintained a presence in Portugal through representatives. During the 60 years of the union, Portugal had 13 different viceroys. A viceroy is a high-ranking official who acts as the king's representative in a specific territory.

Despite being ruled by a Spanish king, Portugal kept a high level of autonomy. The Spanish monarchs respected the pledges made at Tomar in 1581. This meant that Portugal kept its own independent laws and its own currency. Public offices within the empire were reserved for Portuguese subjects. The Portuguese also maintained their own judicial systems. For example, the Desembargo do Paço was the highest law court in Lisbon. It controlled the appointment of judges and oversaw the high courts in overseas territories. This allowed the Portuguese to manage their own legal and religious affairs for much of the union.

However, the union brought new challenges to the Portuguese Empire. The union drew Portugal into the Dutch Revolt, which was a conflict against Spanish rule. The Dutch Republic saw the union as a reason to target Portuguese colonies. This weakened Portugal's influence in the Orient, where its spice trade was very important. The empire was huge, with territories in all known continents of that era. Managing these distant lands while dealing with European wars became increasingly difficult. The pressure from these conflicts eventually led to a desire for independence among the Portuguese people.

The end of the Iberian Union came through the Portuguese Restoration War. The Portuguese people sought to establish their own ruling dynasty. They turned to the House of Braganza to lead them. John IV was acclaimed as the new king of Portugal, breaking the link with the Habsburgs. This change marked the end of the 60-year period of shared rule. While the union was temporary, it remains a significant era in the history of the Iberian Peninsula. It showed how different kingdoms could be linked by a single person while remaining legally distinct.