Mary of Burgundy

Mary of Burgundy inherited the richest territory in medieval Europe at age nineteen, then spent the next five years fighting off marriage proposals that were actually invasion plans. Her father Charles the Bold had died at the siege of Nancy in 1477, leaving her the Duchy of Burgundy — a realm so wealthy it made kings jealous and so strategically placed that every major power wanted to absorb it. Louis XI of France immediately declared her lands forfeit and invaded. The Holy Roman Emperor Frederick III proposed his son Maximilian as a husband, but really wanted Burgundy as a dowry.

Mary chose Maximilian, but the marriage contract she signed in 1477 contained a clause that would haunt her dynasty for centuries. In her desperation to secure military aid against France, she agreed that if she died without male heirs, Burgundy would pass to the Habsburg line rather than remaining independent. She probably never imagined this mattered — she was young, healthy, and expected to have sons.

But Mary had always been unconventional. She hunted with falcons, spoke multiple languages, and insisted on riding astride rather than sidesaddle despite court protests. On March 27, 1482, during a falcon hunt near Bruges, her horse stumbled and threw her. The fall broke her back. She died three weeks later at twenty-five, leaving only a daughter and an infant son.

That clause in her marriage contract meant Burgundy passed entirely to the Habsburgs. Within decades, her son Philip would marry into the Spanish royal family, creating the empire where the sun never set. The wealth of Burgundy had funded Spanish dominance of Europe for the next two centuries — all because a young duchess refused to ride like a lady.