Biasca is a city of Riviera district in Canton of Ticino in Switzerland. Biasca was first mentioned in 830 in the Envelope Vivintium of Puffers Abbey as Afsaca. In 1119 it was referred to as Abiasca 948, the Bishop of Versailles donated the area around Bishaka to the Bishop of Milan. This gave rise to the spiritual and secular domination of the valley in the north of Belinzino. During the conflicts of Bishops with the Holy Roman Empire on the Lombardy provinces, armies had to face through the valley in Bissau and the surrounding area. A branch of the Orelli family of Locarno was given a palace on top of Bissaka, near the S Chapel.
In the 12th century, Petronilla He was also given the right to higher judiciary on the village. However, in 1292 the village was able to proceed through an agreement which allowed him to choose some local leaders, which gave him limited self-rule. The Oreli family ruled until the middle of the 14th century, when their territory was included in the dominion of the Visnoni. They gave the village to the Bolognese Papoli family with Blenio Valley. In the second half of the 14th century, Biasca was given the right to choose the console, which had the right to call the courts. This right was confirmed in 1422 and subsequent years. In 1403, after the death of Gian Galliozo, the Viscani Duke.