The Habsburgs summary

Maximilian's son, Philip the Handsome, cemented the family business in strategic marriage alliances. Philip married Joanna of Castile, daughter of Ferdinand and Isabella – the Spanish monarchs who had sponsored Columbus's voyages to the Americas. When a series of unexpected deaths made Joanna heir to the Spanish kingdoms, the Habsburg family suddenly found themselves positioned to inherit not just Spain, but its rapidly expanding global empire.

Philip and Joanna's son, Charles V, came to embody Habsburg power at its zenith. Born in 1500, Charles inherited an astonishing collection of territories: from his father, the rich Burgundian lands; from his Spanish mother, the kingdoms of Castile and Aragon, along with their Italian possessions, North African outposts, and the new American colonies. In 1519, he was elected Holy Roman Emperor, adding central European territories to his domain.

The split between the Spanish and Austrian branches didn't end the Habsburg story – but it began a new chapter of challenges and reinventions. Both branches embraced the Counter-Reformation in the 16th century with remarkable zeal. As Protestant ideas spread across Europe, the Habsburgs positioned themselves as the defenders of Catholicism. They funded Jesuit colleges, built magnificent baroque churches, and sponsored religious art that would inspire the faithful.

This intense religious commitment, however, helped ignite one of Europe’s most destructive conflicts: the Thirty Years’ War (1618–1648). Sparked by tensions between Catholic and Protestant states, what began as a rebellion in Habsburg-ruled Bohemia soon escalated into a devastating, continent-wide conflict that left much of Central Europe in ruins. The war ended with the Treaty of Westphalia, which significantly curtailed Habsburg power by recognizing the sovereignty of German princes and limiting imperial control within the Holy Roman Empire.

While the Habsburg political strategy of marriage alliances had built them a global empire, it came with an increasingly visible cost. As Habsburg princes and princesses married their cousins, nieces, uncles, and other relatives, their family tree began to fold in on itself in concerning ways.

The Spanish branch of the family demonstrated these effects most dramatically. Philip II's heir, Philip III, was the product of the marriage between close relatives. His son, Philip IV, would marry his own niece, producing Charles II – the last Spanish Habsburg. Charles was perhaps the most obvious casualty of generations of inbreeding. He was born physically deformed, with the pronounced "Habsburg jaw" that made eating difficult. He suffered from numerous health problems throughout his short life.

By the dawn of the twentieth century, the Habsburg Empire had survived more than six centuries of turbulent European history. Its final chapter would open with Emperor Franz Joseph still on the throne – a living symbol of Habsburg continuity in rapidly changing times. Now in his eighties, the emperor had witnessed the transformation of his realm from a traditional monarchy to a dual Austro-Hungarian state trying to manage the complex aspirations of its many nationalities.

Franz Ferdinand, the emperor's nephew and heir to the throne, represented both the enduring Habsburg bloodline and its mounting challenges. Like many of his ancestors, Franz Ferdinand's family tree folded back on itself multiple times. A diligent researcher who mapped his ancestry discovered he was related to many ancestors through multiple lines of descent – solid evidence of the dynasty's persistent intermarriage practices.