[2] Together with Lopagno and Campestro, Cagiallo formed a Bürgergemeinde from the Middle Ages through the modern era.
The late medieval church of S. Matteo was rebuilt 1672, but retained the romanesque clock tower.
In the 18th and 19th Centuries, the Battaglini family played an important role throughout the valley.
Cagiallo supports the tourist facilities and hotels of the village of Tesserete, and has become a suburb of it in recent years.
[2] The former municipality also contained the villages Sarone, Almatro, Bettagno and San Matteo-Muralta.