It is the oldest of Boiro's churches. This building of Romanesque style from the second half of the 12th century. It still conserves the head and part of the ship, as well as the cover. It was enlarged in 1690. It presents an apparent plant of a cross that is not the original one, as the lateral chapels were later added in the eighteenth century. It conserves in its interior a gothic baldaquino of century XVI and a beautiful lying Christ. The bell tower was built in 1794. On the head is an original cross of Celtic tradition.