The Burgundian inheritance in the Low Countries consisted of numerous fiefs held by the Dukes of Burgundy in modern-day Belgium, Netherlands, Luxembourg, and in parts of France and Germany.
Around the 13th and early 14th century, various Dutch cities became so important that they started playing a major role in the political and economical affairs of their respective fiefs.
[1] At the same time, the political system of relatively petty lords was ending, and stronger rulers (with actual power over larger territories) started to emerge.
When Count Louis II of Flanders, died without a male heir, these cities (Bruges, Ypres, and Ghent) arranged a marriage between his daughter, future Countess Margaret III, and the duke of Burgundy, Philip the Bold.
[2] The period ended in great turmoil, as the rise of Protestantism, the centralist policies of the Habsburg Empire, and other factors resulted in the Dutch Revolt and the Eighty Years' War.