This Benedictine monastery was the most influential of the Fisterra region during the Middle Ages and even served as a refuge for Galician kings during the monarchist struggle. During the centuries it suffered the looting of Normands (Nordic conquerors) and Saracens (the name with which the medieval Cristians referred to the Arab or Muslim.) It’s a Romanesque building of the 12th century of which is only conserved the church, basilical plant with three naves and three apses. Next to the south lateral ship was located the old convent that communicated with the church through a beautiful door. It’s one of the few temples that preserve pictorical remains of the 14th century in Galicia. The paintings represent the seven deadly sins and death. Besides, the portico of the main facade has three pairs of columns with figures representing the apostles. On them are archivolts with figures that resemble those of the Portico de la Gloria of the Santiago de Compostela Cathedral.