Seventeen Provinces
Maximilian's grandson and successor, Emperor Charles V of Habsburg eventually won the Guelders Wars and united all seventeen provinces under his rule, the last one being the Duchy of Guelders in 1543. The Burgundian treaty of 1548 shifted the seventeen provinces from the Lower Rhenish–Westphalian Circle to the Burgundian circle, resulting in a significant territorial gain for the latter and increased tax obligation. The Pragmatic Sanction of 1549 determined that the Provinces should remain united in the future and inherited by the same monarch. After Charles V's abdication in 1556, his realms became divided between his son, King Philip II of Spain, and his brother, Emperor Ferdinand I. The Seventeen Provinces went to his son Philip.