It was founded by Froila and built in 940, in the vegetable garden of the Celanova monastery. It is a jewel of Mozarab art, with three bodies: a vestibule; the nave, of quadrangular plan, and an apse of circular plan but rectangular from the outside. Inside, it has a cross vault on horseshoe arches in the transept and raised dome. Its roof is pitched. The entrance door is lintelled. It is dedicated to San Miguel.