In the 15th century, the marriage between heiress Margaret III of Flanders and Philip the Bold, Duke of Burgundy, produced a new Duke of Brabant of the House of Valois (namely Antoine, their son). In 1477, the Burgundian duke Charles the Bold perished in the Battle of Nancy. Through the marriage of his daughter Mary of Burgundy (who was born in Brussels) to Holy Roman Emperor Maximilian I, the Low Countries fell under Habsburg sovereignty. Brabant was integrated into this composite state, and Brussels flourished as the Princely Capital of the prosperous Burgundian Netherlands, also known as the Seventeen Provinces. After the death of Mary in 1482, her son Philip the Handsome succeeded as Duke of Burgundy and Brabant.