Mary, called Mary the Rich (13 February, 1457 – 27 March, 1482), was suo jure Duchess of Burgundy from 1477 – 1482. As the only child of Charles the Bold, Duke of Burgundy, and his wife Isabella of Bourbon, she was the heiress to the vast Burgundian domains in France and the Low Countries upon her father's sudden death on 5 January 1477. Her mother died in 1465, but Mary was on very good terms with her stepmother Margaret of York, whom Charles married in 1468.
As the only child of Charles the Bold, Mary was heiress to a vast and wealthy domain, made up of the Duchy of Burgundy, the Free County of Burgundy, and the majority of the Low Countries, and her hand was eagerly sought by a number of princes. The first proposal was received by her father when she was only five years old, to marry the future Ferdinand II of Aragon. Later the younger brother of Louis XI, Charles de Valois, Duc de Berry made an approach, to the intense annoyance of his brother the King, who attempted to prevent the necessary Papal dispensation for consanguinity.
As soon as Louis produced a male heir who survived infancy, the future Charles VIII of France, Louis wanted his son to be the one to marry Mary, despite his son being thirteen years younger than Mary. Nicholas I, Duke of Lorraine was a few years older than Mary, and his Duchy lay alongside Burgundian territory, but his plan to combine his territory with hers was frustrated by his death in battle in 1473.
When her father fell upon the field at the siege of Nancy, on 5 January 1477, Mary was only nineteen years old. Louis XI of France seized the opportunity afforded by his rival's defeat and death to attempt take possession of the Duchy of Burgundy proper, and also of Franche Comté, Picardy and Artois.
Louis was anxious that Mary should marry Charles, the Dauphin of France, and thus secure the inheritance of the Low Countries for his descendants, by force of arms if necessary. Mary, advised by Margaret, distrusted Louis, declined the French alliance, and turned to her Netherland subjects for help. Sensing her weakness, she obtained their help only at the price of great concessions.
Such was the hatred of the people for the old regime that two of her father's influential councillors, the Chancellor Hugonet and the Sire d'Humbercourt, having been discovered in correspondence with the French king, were executed at Ghent despite the tears and entreaties of the youthful duchess.
Mary now made her choice among the many suitors for her hand, selecting the Duke Maximilian of Austria (after her death the Holy Roman Emperor Maximilian I). The marriage took place at Ghent on 18 August 1477. By marrying Duke Maximilian of Austria, son of the Duke of Austria, she became Duchess Mary of Austria. In this way the Low Countries came to the Habsburgs, initiating two centuries of contention between France and the Habsburgs, later of Spain, then of Austria, for their possession, which climaxed in the War of the Spanish Succession, 1701–1714.
In the Netherlands, affairs now went more smoothly, the French aggression was temporarily checked, and internal peace was in a large measure restored.
Five years later, the 25-year-old Duchess met her death by a fall from her horse on 27 March 1482 near the Castle of Wijnendale. She loved riding, and was falconing with Maximilian when her horse tripped, threw her, and then landed on top of her, breaking her back. She died several days later, having made a detailed will. She is buried in Bruges.
Louis was swift to re-engage, and forced Maximilian to agree to the Treaty of Arras (1482) by which Franche Comté and Artois passed for a time to French rule, only to be exchanged for Burgundy and Picardy in the Treaty of Senlis (1493), which established peace in the Low Countries.
Her children were:
| Mary of Burgundy | Father: Charles the Bold | Paternal Grandfather: Philip the Good | Paternal Great-grandfather: John the Fearless |
| Paternal Great-grandmother: Margaret of Bavaria | |||
| Paternal Grandmother: Isabel of Portugal | Paternal Great-grandfather: John I of Portugal | ||
| Paternal Great-grandmother: Philippa of Lancaster | |||
| Mother: Isabella of Bourbon | Maternal Grandfather: Charles I, Duke of Bourbon | Maternal Great-grandfather: John I, Duke of Bourbon | |
| Maternal Great-grandmother: Marie, Duchess of Auvergne | |||
| Maternal Grandmother: Agnes of Burgundy | Maternal Great-grandfather: John the Fearless | ||
| Maternal Great-grandmother: Margaret of Bavaria |
Mary's daughter Margaret died childless, she had one miscarriage in her life, but her son Philip I of Castile is an ancestor of many monarchs, through Mary's grandson Charles she is an ancestor of many Spanish Kings such as Philip II of Spain and Philip III of Spain. Her greatgrand daughter was Johanna of Austria who was the mother of both Eleonora de' Medici and Marie de' Medici, Eleonora was the mother of Francesco IV Gonzaga. Marie became Queen of France, through Marie's son Louis, Mary are ancestors of French Kings, through Marie's daughter Henrietta Maria (who is the mother of Charles II of England and James II of England) Mary is an ancestor of English Kings.