the Burgundian Circle, but to the Lower Rhenish-Westphalian Circle. The largest of these was the Prince-Bishopric of Liège, the green area on the map, including the County of Horne. The ethnically and culturally Dutch duchies of Cleves and Julich did not join either. In the north, there were also a few smaller entities like the island of Ameland that would retain their own lords until the French Revolution. Historians came up with different variations of the list, but always with 17 members. This number could have been chosen because of its Christian connotation. History The Seventeen Provinces originated from the Burgundian Netherlands. The dukes of Burgundy systematically became the lords of different provinces. Mary I of Valois, Duchess of Burgundy was the last of the House of Burgundy. Mary married Maximilian I of Habsburg, Emperor of the Holy Roman Empire in 1477, and the provinces were acquired by the House of Habsburg on her death in 1482, with the exception of the Duchy of Burgundy itself, which, with an appeal to Salic law, had been reabsorbed into France upon the death of Mary's father, Charles the Bold. Maximilian and Mary's grandson, Charles V of Habsburg, Emperor of the Holy Roman Empire and King of Spain, eventually united all 17 provinces under his rule, the last one being the Duchy of Guelders, in 1543. Most of these provinces were fiefs of the Holy Roman Empire. Two provinces, the County of Flanders and the County of Artois, were originally French fiefs, but sovereignty was ceded to the Empire in the Treaty of Cambrai in 1529. On 15 October, 1506, in the palace of Mechelen, the future Charles V was recognized as Heer der Nederlanden ("Lord of the Netherlands"). Only he and his son ever used this title. 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 1555, his realms were divided between his son, Philip II of Habsburg, King of Spain, and his brother, Ferdinand I, Holy Roman Emperor. The Seventeen Provinces went to his son, the King of Spain. Conflicts between Philip II and his Dutch subjects led to the Eighty Years' War, which started in 1568. The seven northern provinces gained their independence as a republic called the Seven United Provinces. They were: the Lordship of Groningen and of the Ommelanden the Lordship