1703 and rebuilt in 1730. It was renovated in the late 20th century. The village didn't have a drivable road until 1885. The local economy was based on agriculture, animal husbandry, and, for a time, emigration. Most of the population is elderly, the few younger residents have either moved away or commute to Locarno. Mosogno Mosogno is first mentioned in 1277 as Mosogno. In 1352 it was mentioned as Muxognio. In the Middle Ages, it was one of the five Squadre that made up the community of Onsernone. It became an independent municipality in 1803. The church of S. Bernardo was built along the road in 1596. It became parish church and center of its own parish after it separated from Loco in 1685. The settlement of Mosogno Sotto has had the Chapel St. Maria Addolorata since 1684. In 1657 the chapel of S. Maria della Natività was built in Bairon, while in Chiosso the chapel of S. Giacomo was built in the second half of the 17th century. The decline of the straw factory, emigration and recent migration to urban centers, have led to a steady decline in population since the late 19th century. Auressio Auressio is first mentioned in 1233 as Oraxio. Until the 19th century, the village had much closer ties to Piedmont than to the rest of the Onsernone valley. The construction of the road through the valley in the 19th century brought it closer to the rest of the valley. The church of S. Antonio Abate was finished in 1526 and became the center of an independent parish in 1792 after it separated from Loco. After World War II farming and grazing were almost abandoned and replaced by short-term, seasonal emigration. The improved transport links to the nearby town of Locarno increased Auressio's attractiveness as a place to live for those that were employed in Locarno. This led to a clear population increase in recent years. One notable building in Auressio is the Villa Edera, which was built in 1887, for the Paris impresario Paolo Antonio Calzonio. It was restored in the early 1990s by the municipality and is now used as a hostel. Berzona Berzona is first mentioned in 1265 as Berzona. The village section of Seghelina is located directly on the main road, while the main village of Berzona is above the road. During the Middle Ages it was part of the Squadra