The States of Brabant were the representation of the three estates (nobility, clergy and commons) to the court of the Duke of Brabant. The three estates were also called the States. Supported by the economic strength of the cities Antwerp, Brussels and Leuven, the States always were an important power before the rulers of the country, as was reflected by the charter of the duchy.
After the Duchy of Brabant and all Seventeen Provinces of the Netherlands came under the rule of the dukes of Burgundy, the States of Brabant became the host of the States-General of the Netherlands, who used to assemble in Brussels.