 In the Middle Ages, Moaña was under the jurisdiction of the bishop of Iria Flavia and Santiago de Compostela.In the 7th century Norman attacks caused a loss of population throughout the Morrazo, but from the 12th century, took place a new resurgence of the population, after Archbishop Diego Gelmírez established a plan to defend the coast.From these dates are the churches of San Martino and San Xoán of Tiran.