It seemed as if, in his sympathy for his Belgian provinces, the emperor had been more clear-sighted than his subjects, for we know that he entertained, in 1527, the idea of forming the Low Countries into a separate kingdom. If this project had been realized, Belgian independence might have been maintained. But the very prosperity of the Low Countries made such realization impossible. In urgent need of money for his military expeditions, the emperor could not deliberately sacrifice his principal source of revenue--the taxes provided by the States General and the loans raised in Antwerp. Since 1522, Margaret had again taken up the governorship, this time in full accord with the Belgian nobility. From that date till the end of the eighteenth century, with the sole exception of the short reign of Albert and Isabella, Belgium was administered, not by its natural princes, but by governors, most of them without power or initiative and obeying orders received from headquarters. Charles spent only ten years in the country until his abdication in 1555. Philip II made only a short appearance, and until Joseph II none of the rulers who had the responsibility of the government took enough interest in the welfare of their Belgian subjects to visit the provinces. Margaret, however, preserved a great deal of independence, and succeeded in curbing the will of her nephew in the greater interests of the Netherlands, as she had curbed the will of her father. When, in 1528, war broke out again between the emperor and an Anglo-French coalition, she succeeded in maintaining the trade with England. In the same way she constantly opposed Charles's project to help his relative, Christian II of Denmark, to reconquer his throne, since such a policy would have ruined Belgian trade with Denmark and the Hanseatic towns. Finally, in 1529, she succeeded in negotiating the peace of Cambrai, whose clauses bear the mark of a truly national policy. Charles renounced all pretensions to Burgundy, while Francis gave up all claims on the Netherlands and recognized Charles's sovereignty over Artois, Flanders, Cambrai and Tournaisis. By inducing the two rivals to recognize the established position and to renounce ancient dynastic claims on each other's domains, Margaret hoped to ensure a long peace for the greater benefit of the Netherlands. The final renunciation of France of her rights over her old fiefs was bound also to consolidate Belgian unity, the link binding the provinces to the Empire being purely nominal. Thus, after a struggle of seven hundred years, the Western Netherlands were finally detached from France. In order to celebrate the event, Lancelot Blondeel designed the monumental mantelpiece in carved wood which may still be admired, in the Palace of Justice of Bruges, and where the victorious emperor is represented having, on one side, Ferdinand and Isabella, and on the other, Maximilian and Mary of Burgundy, his maternal and paternal ancestors.