The privilege granted by Alfonso IX to Porto Historical milestone · Porto, Sanabria, Zamora Image of Porto, not of the place itself. Alfonso IX of León confirmed at Salamanca, in 1209, the charters of Porto; thirteen years later, in 1222, the same monarch handed the town over to the Order of Santiago together with the neighbouring settlement of Pías. 1209 Photo: Estevoaei (CC BY-SA 4.0) What to see and do in Porto