Of the monastic complex founded by San Rosendo, the only architectural remainder that remained in time is the oratory of San Miguel, finished in 942 in memory of his brother Fraila, as indicated by the inscription located above the entrance door, which is nothing more than a prayer to Christ, of “Fraila sinner and unworthy servant of God”. The chapel, built with perfect granite silars, measures 8.5 m. long by 6 m. high, occupying a floor of 22 m². Both exteriorly and interiorly three volumes or bodies can be distinguished. Both for its dimensions and for the singular architectural configuration that identifies it, it constitutes a unique specimen in the Iberian Peninsula and a model that is indispensable to know in order to understand the times of Christian repopulation, not only in Galicia, but in the whole north of the Peninsula.
