
Castilla y León is an autonomous community of Spain, the country's largest — in fact, it is the largest subnational political division in the European Union. It is formed by the union of two ancient kingdoms: Old Castile (Ávila, Burgos, Segovia and Soria) and the Kingdom of León (León, Zamora, Salamanca, Palencia and Valladolid), which were separated and reunited several times in the Middle Ages.