Myth: The 1714 Catalonia lost its independence: it was conquered by Spain and the Catalan institutions were abolished.
Fact: Before 1700 Catalonia was not independent but was a territory of their own institutions integrated into the Spanish Crown for centuries.
That year, King Charles II (of Spain, including Catalonia) died childless and began a war of succession to the throne (not Civil sovereignty) between two candidates: Philip of Anjou, French and Charles of Habsburg-German-. In all there were territories of the Crown and other supporters of a candidate.
Catalan institutions first swore allegiance to Philip of Anjou (Parliament of 14 January 1702, in Barcelona), but after an Anglo-Dutch fleet in favor of Charles landed in the river Besos (25 August 1705) Barcelona won and the indifference of the population. On October 16, the Catalan institutions were recognizing Charles as king of Spain.
Finally, the war ended with the resignation of Charles to the throne (because it had been called Holy Roman Emperor) and Philip V had no opposition: he amnestied the leaders of the revolt austracista but abolished Catalan institutions, creating a state centralized in imitation of France at that time.
Institutions were estamentales eighteenth century, typical of feudalism: representing the aristocracy, the bourgeoisie and the high clergy. Argued, therefore, the interests of those. There was not a Parliament as we know today, as it is popular and national sovereignty back items not known at the time of the facts.
Another myth
"Spain and France divided Catalonia as war booty. Therefore Northern Catalonia is under French oppression"
It's not just a myth, but a falsehood as a grand piano, but those big.
There were no spoils of war, simply because Catalonia lost no war, nor Spain won any battle at that time.
In the seventeenth century, there were several wars between France (strong, with encouragement to expand) and Spain (in crisis after losing the war against Holland and England).
Consequence of this weakness on Hispanic Corona was losing territories for France: So, by the Treaty of the Pyrenees (1659), France is not only Roussillon, but also Artois (north of France, passing Calais), strategic points in Flanders and Luxembourg, etc.. Previously, France was also Alsace, Lorraine, Franche Cash, etc..
In short: it was the expansionism of France, taking advantage of the weakness of that moment of Hispanic Corona as France scraped Roussillon, among other territories much more strategic and important Roussillon.