of Bourbon, as the senior representative of the senior-surviving branch of the Capetian dynasty (first prince of the blood), became King of France as Henry IV. Bourbon monarchs then united to France the part of the Kingdom of Navarre north of the Pyrenees, which Henry's father had acquired by marriage in 1555, ruling both until the 1792 overthrow of the monarchy during the French Revolution. Restored briefly in 1814 and definitively in 1815 after the fall of the First French Empire, the senior line of the Bourbons was finally overthrown in the July Revolution of 1830. In 1700, at the death of King Charles II of Spain, the Spanish Habsburgs became extinct in the male line. Under the will of the childless Charles II, the second grandson of King Louis XIV of France was named as his successor, to preclude the union of the thrones of France and Spain. On 1 November 1700 a French Bourbon prince, Philip V, acceded to the Spanish throne. In the French royal house, Salic law applied, which did not permit female succession. Accordingly, the traditional Spanish order of succession had to give way to a semi-Salic system, which excluded women from the crown unless all males in the agnatic descent from Philip, in any branch, became extinct. It is not implausible that this change might have been enacted at the insistence of a hostile foreign power, as the scenario of such a union could impinge profoundly on questions of national importance (particularly among states that preferred to maintain their distance from policy positions occupied by the Franco-Spanish consensus, of which the Holy Roman Empire was one). Some disagreement on this topic was evident for a number of years, even after it became clear that any question of a Franco-Spanish union was a political non-starter. Although the Spanish government made several attempts to revert to the traditional order, as in the Decree of 1789 by Charles IV (see below), the succession question became pressing only when, by 1830, Ferdinand VII found himself ailing, without any issue, but with a pregnant wife. He decided in 1830 to promulgate the 1789 decree, securing the crown for the unborn child even if female. The law placed the child, Princess Isabel, ahead of Ferdinand's brother Infante Carlos, who until then had been heir presumptive. Many contemporaries (starting with the King's brother and the cadet Bourbon branches) saw the changed succession as illegal on various counts. They formed the basis for the dynastic Carlist party, which only recognized the semi-Salic succession law that gave Infante Carlos precedence over Ferdinand's daughter, the future Isabella II.