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Porto is one of the most historic villages in Alta Sanabria. During the Middle Ages it was a royal town, meaning that it depended directly on the Crown rather than on a feudal lord or a religious institution. This status granted its inhabitants specific rights, privileges and a degree of local self-government that was uncommon at the time.
King Alfonso VII granted privileges to Porto, and these rights were later confirmed by Alfonso IX of León in Salamanca in 1209. These charters regulated local administration, justice and many aspects of daily life.
Porto’s history was closely linked to the former Kingdoms of León and Galicia. Its location in a mountainous frontier area meant that it shared in the political and territorial changes that shaped the Iberian Peninsula over the centuries.
For many years Porto appeared on maps of the Kingdom of Galicia. Following the territorial reforms of the nineteenth century, it became part of the Province of Zamora, within the present-day Autonomous Community of Castile and León.
The confirmation of Porto’s charter by Alfonso IX also links the village to one of the most important milestones in European political history. In 1188, the Leonese monarch convened the Cortes of León, recognised by UNESCO as the oldest documented example of European parliamentary representation.