Anciently identified as the border between the “free municipality” of Pontremoli and the territories of the Malaspina marquises, the village of Teglia holds a significant position. This small settlement conceals a history dating far back, and to understand its ancient role, one must consider the story of its church. Located along an important mediaeval road that connected Pontremoli through the Zeri area and the Vara valley to the town of Brugnato, Teglia arose precisely at the ford of the stream bearing its name. The Church of the Assumption of Mary, dating back to the 11th century and one of the oldest in the area, was already mentioned in 1133 among the religious buildings transferred from the Diocese of Luni to the Diocese of Brugnato, with which it would remain associated for a long time.

In the parish territory, which also included scattered houses in the countryside, a close-knit community thrived. In the 1940s, they took part in a truly memorable event: the construction of a dam, a few kilometres upstream, and especially a hydroelectric plant, built right on the edge of the village. Hundreds of workers were employed in building the plant, and dozens of men were permanently hired for the operation and maintenance of the facilities, providing a significant boost to the local economy.