Sonogno is a former municipality in the district of Locarno in the canton of Ticino in Switzerland. It is located in Valle Verzasca. On 17 October 2020 the former municipalities of Vogorno, Sonogno, Corippo, Brione (Verzasca) and Frasco merged to form the new municipality of Verzasca. Sonogno is first mentioned in 1200 as Sornono. In 1417 it was mentioned as Senognio. During the Middle Ages, Sonogno was part of the Vicinanza of Verzasca and shared the fate of the valley. From 1395 to 1843, it formed a single community with Frasco. More information...
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