The Torres de Oeste were part of a fortress that dates back to the Castro Era – it was known as the Castro das Torres in the 2nd and 1st centuries BC, as evidenced by the ceramic and bronze weaponry remains. In the Middle Ages this enclave was one of the most important forts in Galicia, as it controlled the river transit in the Ulla River, and it was then when its defence of the city of the Apostle began to become legendary. At the beginning of the 13th century, the monarchy gave the fortress to the archbishopric of Compostela and the enclave continued to be the defence point of the city, until it started to decline during the 15th century with the reign of the Catholic Monarchs. The remains of the two towers and the chapel are still preserved today – they were restored in 1970 and classified as a Historical-Artistic Monument. In the natural beauty of their surroundings, the first Sunday of every August the town celebrates the events that happened during the Viking disembarkation.