The Church of San Xés de Francelos is located in the valley of the same name. Dated from the 9th century, it is a unique construction in the context of Pre-romanesque architecture. It was declared a National Monument in 1951. The façade of its chapel houses several very noteworthy elements. We will pay attention to the horseshoe arch of Visigothic influence, the columns with Corinthian capitals and two biblical scenes.
However, perhaps the most interesting thing about this monument is its famous lattice window. It is decorated with various motifs. Inside, it has two eight-petal flowers, surrounded by three horseshoe bows of different production. It is similar in appearance to the one in Santa Cristina de Pola de Lena (Asturias), although it may also have received influences from Mozarabic art.