Only parts of the side walls remain of St. Martin's Church from the 13th century. They were expanded during the 16th and 17th centuries.
Century inserted into the current building. In the northeast corner of the church square stands the chapel of Sant'Apollinare with folk frescoes. In addition to the two bishop figures, the Biasca landslide is also mentioned as "exitus laci majoris".
On the facade you can see various frescoes from the 16th century, of which the gigantic figure of Saint Christopher stands out. The intact Romanesque bell tower (1207) is leaning against the facade and has traces of another image of St. Christopher on the east side below. During archaeological excavations in 1912 and 1913, under the direction of E. Berta, the foundations of a church with two unequal apses were uncovered, the side walls of which correspond to those of the current church. The single-nave church interior with the inserted bell tower has two chapels, the polygonal presbytery, the baptismal font and the singer's stand made of wood painted with floral patterns on the side. The frescoes on the left wall depict scenes from the life of Jesus and are attributed to Antonio da Tradate, who worked diligently in the Blenio Valley in 1510. The Last Supper and fragments of frescoes on the right side wall probably come from the Seregnesi school. Numerous gilded stuccoes and frescoes in bright colors decorate the choir.
According to a book in the parish archive, it was painted by Bernardino Serodine from Ascona (1650). The two chapels - the Passion of Jesus on the left, the Madonna on the right - are decorated with stucco and finished with a wrought iron grille created by local craftsmen (17th century).