Catalan Counties in the context of "King of Aquitaine"

The Kingdom of Aragon (Aragonese: Reino d'Aragón; Catalan: Regne d'Aragó; Latin: Regnum Aragoniae; Spanish: Reino de Aragón) was a medieval and early modern kingdom on the Iberian Peninsula, corresponding to the modern-day autonomous community of Aragon, in Spain. It became a part of the larger Crown of Aragon, which also included other territories—the Principality of Catalonia (which included the former Catalan Counties), the Kingdom of Valencia, the Kingdom of Majorca, and other possessions that are now part of France, Italy, and Greece—that were also under the rule of the King of Aragon, but were administered separately from the Kingdom of Aragon.

In 1479, upon John II of Aragon's death, the crowns of Aragon and Castile were united to form the nucleus of modern Spain. The Aragonese lands retained autonomous parliamentary and administrative institutions, such as the Corts. The arrangement remained until the Nueva Planta decrees, promulgated between 1707 and 1715 by Philip V of Spain in the aftermath of the War of the Spanish Succession, centralised power in Spain. However, the title "King of Aragon" would continue to be used by the centralised Spanish crown.

The Counts of Girona (Catalan: Comtes de Girona, Spanish: Condes de Gerona) ruled over the County of Girona (currently in Catalonia), the earliest-established of the Catalan Counties which formed the Marca Hispanica. The line was established by the Frankish noble Charles Rostan, Rostany, first Count of Girona (785-801) at the time of Sa'dun al Ruayni.