The church is one of the few examples of Asturian Romanesque with three portals, although the north is now walled up. The south portal has a slightly pointed double archivolt resting on imposts with geometric ornamentation, columns and capitals. The west portal is located in a structure jutting out of building. It is flared with three decorated archivolts resting on columns with decorated capitals. One of the capitals on the left jamb has human figuration.
It underwent major remodelling during the 17th and 18th centuries, building the current square apse, the porch which surrounds the western and southern façades and the sacristy adjoining the south side.
The interior is greatly remodelled, having been destroyed during the Civil War. The original wooden ceiling of the nave has been replaced by a barrel vault with lunettes and transversal ribs. The apse is covered with ribbed vaulting decorated with corbels.
The apse is separated from the nave by a semi-circular triumphal arch resting on two pairs of columns with decorated capitals.
The Church of Santa María was restored in 1986 and 1991 by the Regional Ministry of Education, Culture and Sports.
