Seventeenth-Century Spanish Habsburg Decline System

Timeline

1. 1651–1656Spanish Empire · SpainThe Franco-Spanish War (1635–1659) steadily drained the Spanish treasury; Philip IV's government declared bankruptcy multiple times in 1653 and 1662, American silver imports had fallen by more than half from their 1590s peak, the nobility resisted tax reform, state revenue was severely insufficient, and the imperial system neared collapse.
2. 1659Pheasant Island (Île des Faisans) · Basque CountryChief minister Luis de Haro signed the Treaty of the Pyrenees with French Cardinal Mazarin; Spain ceded Roussillon, Cerdagne, and parts of the Southern Netherlands, and Princess Maria Theresa was betrothed to Louis XIV. The treaty marked the end of Spain's offensive hegemony in Europe, with France rising as the new continental power.
3. 1657–1660Madrid · CastileAfter the peace treaty, the Spanish government attempted fiscal and military reforms, but the Castilian Cortes and regional powers continuously obstructed them; the administration was bloated and redundant, the aging and infirm Philip IV neglected state affairs, court infighting intensified, reforms achieved little, and systemic inertia accelerated the empire's decline over the following decades.