This temple. today Benedictine. is one of the three monasteries that are still inhabited by monks in Galicia. The abbey was founded by San Martiño de Dumio in the sixth century. during the Visigothic period. Its history is related to the refuge of Alfonso II the Chaste before being crowned king of Galicia in 759. which dominated the monastery with the lands. This temple. linked to the great monastic centres of Toledo. has a grandiose Baroque façade reminiscent of the staircase of the façade of the Obradoiro in Santiago de Compostela. Inside there are two cloisters: the first. the cloister of Father Feijoo. from the late 17th century. is considered with its 54 metres per side. the largest of its kind in Spain. being its style a sample of the transition from Renaissance to Baroque. In the centre there is a statue of the monk who lived in this monastery. the work of Moure. It is noteworthy the sacristy of the late 18th and early 19th centuries. It has an octagonal floor plan crowned with a dome over pendentives and round arches. The second cloister. known as the cloister of the Nereidas. is Gothic in style and is presided over in the centre by a beautiful Baroque fountain. The life of the abbey revolved around this cloister. which is covered with a ribbed vault and still conserves a Romanesque façade. so the kitchen. refectory and library areas open onto the courtyard. Also peculiar is the sacristy of the temple. in baroque style. dating from the late 18th and early 19th centuries. for the development of its circular floor plan. with a dome on pendentives. with carvings representing the theological and cardinal virtues. and cornice inverted over round arches. arranged in a circle and supported by pilasters attached to the walls. The monastery preserves the entrance door to the old church. from the 13th century. The Chapel of San Salvador. or Chapel of the Cypress. is a small and simple work from the end of the ninth century in Mozarabic style. Its floor plan is slightly trapezoidal. in which two bodies can be distinguished. a nave and a small chancel. and a single access door.