Located at the beginning of Rúa Maior, opposite the tower of the Fortress and the courthouse (former Hospital of Santo Antón de Abade). It is a 13th century work, with a single rectangular nave, a wooden roof and a semicircular apse.

Framed in the primitive Gothic style, it has a Pantocrator of archaic design on the north façade. The bell gable is from 1860 and was built by the Sarrian builder Francisco Castiñeira.

It contains some Romanesque elements, Gothic arches and doors. The apse is of transitional Romanesque design, with a rectangular section and a semicircular head, with a barrel vault and a quarter sphere respectively.

On the front there is a Gothic door, and on the north wall there is a transition door with archaic elements. This has a slightly pointed arch, formed by a baquetilla archivolt, capitals with leaves and rods and a human head. The tympanum is seen, for some, as the figure of Christ Majesty, and for other authors, as the figure of Melchizedek, and even as the figure of King David, in an attitude of blessing, with naive features, in the middle of schematized trees, topped by a Greek cross (crosses inscribed in circles); the corbels on the north side represent human heads, scrolls, rosettes, nail points. There are numerous stone signs on this façade. The ornamental ironwork, also from medieval times, existing on the north door are notable.