Nueva Planta Decrees

The Nueva Planta decrees (Spanish: Decretos de Nueva Planta, Catalan: Decrets de Nova Planta) were a number of decrees signed between 1707 and 1716 by Philip V—the first Bourbon King of Spain—during and shortly after the end of the War of the Spanish Succession by the Treaty of Utrecht.

Angered by what he saw as sedition by the Catalans and taking his native France as a model of a centralized state, Philip V suppressed the institutions, privileges, and the ancient charters (Spanish: fueros, Catalan: furs) of almost all the areas that were formerly part of the Crown of Aragon (Aragon, Catalonia, Valencia, and the Balearic Islands). The decrees ruled that all the territories in the Crown of Aragon except the Aran Valley were to be ruled by the laws of Castile ("the most praiseworthy in all the Universe" according to the 1707 decree), embedding these regions in a new, and nearly uniformly administered, centralized Spain.

The other historic territories—Navarre and the other Basque territories—supported Philip V initially, whom they saw as belonging to the lineage of Henry III of Navarre, but after Philip V's military campaign to crush the Basque uprising, he backed down on his intent to suppress home rule.

...
Wikipedia