The Saint-Martin de Viabon church dates back to the 11th century. Its plan includes a nave ending in a semicircular apse. In the 15th century, a four-bay aisle forming gables was erected to the north.
The bell tower also dates from this period. Adjacent to the south wall of the choir, it is octagonal in shape and pierced by sixteen overlapping pointed arches. It rests on a quadrangular tower with powerful buttresses. A semicircular arch known as a "wolf's tooth" arch survives between two buttresses in the south wall of the nave. It is surmounted by a small sculpted stone head at the base of the pointed arch window.
The apse's framework is ancient. In 1862, the paneling of the main nave was replaced by a plaster-covered latticework with faux stone carvings. The restoration of the choir walls and vault, as well as the hollow brick vault of the side aisle, also dates from the same period. This building underwent numerous interior alterations in the 19th century. The eastern end of the side aisle is occupied by the Chapel of the Virgin, entirely decorated with paintings and gilding in 1887.
For the restoration of the framework and roof, particularly the end of the side aisle, the Sauvegarde de l'Art Français (French Art Protection Agency) awarded a donation of €17,000 in 2002.