uhm, one could argue that Spain is one of the oldest kingdoms in Europe, starting with the kings of the Visigots after the fall of the Roman empire, and from the Kings of Aragon, Castille, Leon, Navarre towards the Hasburg dynasty and ending with the Bourbons, who took a break from the 30-ties till the 70-ties of the 20th century (which is not long if one compares it to the foundation of the spanish monarchies, or even to the establishment of the Kingdom of Spain, or to the establishment of the Bourbon family on the throne in the 18th century.