It is a small Romanesque church located in a mountainous area known as Fuentes del Narcea. According to legend, the church was built in the 9th century by a group of monks who discovered a statue of the Virgin Mary in a holly tree. The statue became known as the "Virgin of the Holly" or the "Virgin of the Holly," and the church was built in her honor. The interior of the church is decorated with frescoes from the 12th and 13th centuries, depicting scenes from the Bible and the life of Christ. The altar has a beautiful reredos carved in wood and painted with gold leaf, with images of the Virgin Mary, Saints Peter and Paul, and other saints. A popular destination for pilgrims and tourists who come to admire the beautiful architecture and rich history of the church. It is also a starting point for several hiking trails that lead to the nearby mountain peaks.