1469–1516: the forging of a new state
Before 1469 Castile was torn by civil war and powerful nobles. The marriage of Isabella of Castile and Ferdinand of Aragon (1469), and Isabella's victory in a succession war (1479), gave both kingdoms the same rulers. It was a dynastic union: Castile and Aragon kept separate laws, taxes, coins and Cortes (assemblies).
Restoring royal authority
- Santa Hermandad: a royal police force for law and order.
- Royal Council staffed by university-trained lawyers (letrados) instead of great nobles.
- Corregidores: royal officials placed in towns.
- Control of the rich military orders and of church appointments.
Historians debate whether this was a "New Monarchy": royal power grew a lot, but Aragon stayed largely self-governing and nobles kept land and status.
Religion, Jews and Moriscos, and the economy
- 1478: the Spanish Inquisition, under royal control, investigated converts (conversos) accused of secretly keeping their old faith.
- 1492: Granada, the last Muslim kingdom in Iberia, surrendered. The same year Jews were ordered to convert or leave; many tens of thousands left.
- 1499–1502: after a revolt, Muslims in Castile were forced to convert; they became known as Moriscos. Aragon's Muslims followed in the 1520s.
- 1492: Isabella backed Columbus, who reached the Caribbean, starting Castile's American empire.
Economy
Castile's main wealth was wool, controlled by the sheep-owners' guild (Mesta), and trade through Burgos and Seville. Agriculture was weak, and the loss of Jewish and Muslim skills and money hurt some trades. After 1503, Seville's House of Trade (Casa de Contratación) controlled American trade.
1516–1556: Charles I and the drive to Great Power status
Charles' inheritance
Charles of Habsburg inherited Castile and its American lands, Aragon with Naples, Sicily and Sardinia, the Netherlands and Burgundian lands, and Habsburg Austria. In 1519 he was elected Holy Roman Emperor (Charles V).
Workings of empire
Early on, Castilians resented his Flemish advisers and taxes: the Comuneros revolt (1520–21) and the Germanías in Valencia were crushed. Charles then ruled through a system of councils (Castile, Aragon, Indies, Finance, State) and viceroys, and learned to work with Castilian elites.
Foreign relations and religion
Long wars with France over Italy (victory at Pavia, 1525), defence against the Ottoman Turks in the Mediterranean, and conflict with Protestant princes in Germany. In Spain the Church was reformed, Protestant ideas were suppressed by the Inquisition, and Spanish theologians shaped the Catholic Reformation (Council of Trent).
Expansion
Cortés defeated the Aztec empire (1519–21) and Pizarro the Inca empire (1530s). The New Laws (1542) tried, with little success, to limit abuse of Indigenous people. Silver mines at Potosí (1545) and Zacatecas (1546) began to send huge wealth to Seville. Charles abdicated in 1556, splitting his lands between his son Philip (Spain) and his brother Ferdinand (Austria).
1556–1598: Philip II, Golden Age and Great Power
Government and the Golden Age
Philip II settled the court in Madrid (1561) and built El Escorial. He governed by paper, reading and noting thousands of reports: careful but slow. Court factions (Alba vs Éboli) competed for influence. Art and writing flourished: El Greco, Teresa of Ávila, the start of the literary Golden Age.
Religion and society
Strict Catholic policy; the Morisco revolt of the Alpujarras (1568–70) was crushed and Moriscos were scattered across Castile.
Great Power abroad
- Peace with France (Cateau-Cambrésis, 1559).
- Victory over the Ottoman fleet at Lepanto (1571).
- Union with Portugal and its empire (1580): the first empire "on which the sun never set".
- The Dutch Revolt (from 1566) drained money for decades.
- The Armada against England failed (1588).
Money troubles
Despite American silver, the crown declared bankruptcy in 1557, 1560, 1575 and 1596. Prices rose about four times over the century (the price revolution), Castile carried most taxes, and debts to Genoese and German bankers grew.
The Hispanic Monarchy and colonial legacy
The Hispanic Monarchy was a composite monarchy: many kingdoms with their own laws joined under one king. In the Americas, viceroyalties (New Spain, Peru), the Council of the Indies and audiencias (courts) ruled.
- Harm: conquest, forced labour (encomienda, mita) and new diseases such as smallpox caused a catastrophic fall in the Indigenous population; enslaved Africans were brought in large numbers.
- Debate: thinkers like Bartolomé de las Casas defended Indigenous rights (Valladolid debate, 1550–51).
- Lasting legacy: Spanish language, Catholic faith, mixed (mestizo) societies, cities built on a grid plan, universities, new crops moving both ways (maize, potato, tomato; wheat, horses), and silver that linked Europe, the Americas and Asia in the first global trade.
Try it
Draw a timeline from 1469 to 1598 and mark the three reigns. For each of eight events, draw an up arrow (crown stronger) or a down arrow (crown weaker). Then compare with the slider in the last 3D step. Which ruler has the most down arrows, and why?
Key formulas and definitions
- Dynastic union: two crowns, one ruling couple, separate laws
- New Monarchy: stronger royal government, weaker nobles
- Conversos: converted Jews; Moriscos: converted Muslims
- Composite monarchy: many kingdoms under one king
- Conciliar system: government through councils
- Price revolution: long rise in prices linked to silver and population growth
- Encomienda / mita: forced labour systems in the Americas
Worked examples
1. Explain why the 1469 marriage did not create a fully united Spain.
Castile and Aragon shared rulers but kept separate laws, taxes, coins, assemblies and customs borders. Aragon's Cortes limited the king. So it was a union of crowns, not one centralised state.
2. How far did the Catholic Monarchs restore royal authority? Give one strength and one limit.
Strength: the Hermandad, letrado councils and corregidores brought order and royal control to Castile's towns. Limit: great nobles kept their lands and power locally, and Aragon was hardly changed.
3. Why was Philip II often short of money despite American silver?
Wars in the Netherlands, the Mediterranean and against England cost more than the silver brought in. Silver was often promised to bankers in advance, prices were rising, and the tax burden fell mostly on Castile, which was not growing fast enough. So the crown declared bankruptcy four times.
Common mistakes
- Saying Spain became one state in 1469. It was a union of crowns with separate kingdoms.
- Mixing up Charles I and Charles V. They are the same person: Charles I of Spain, Charles V as Holy Roman Emperor.
- Thinking American silver made Spain rich at home. Much of it went to foreign bankers and wars, and prices rose.
- Treating the Armada (1588) as the moment Spain collapsed. Spain stayed a great power for decades afterwards.