A common administration of the Netherlandish fiefs, centred in the Duchy of Brabant, already existed under the rule of the Burgundian duke Philip the Good with the implementation of a stadtholder and the first convocation of the States General of the Netherlands in 1464. His granddaughter Mary had confirmed a number of privileges to the States by the Great Privilege signed in 1477. After the government takeover by her husband Archduke Maximilian I of Austria, the States insisted on their privileges, culminating in a Hook rebellion in Holland and Flemish revolts. Maximilian prevailed with the support of Duke Albert III of Saxony and his son Philip the Handsome, husband of Joanna of Castile, could assume the rule over the Habsburg Netherlands in 1493.