Each village in the upper Versilia has at least one Alpe, where the inhabitants with their families and their herds moved from spring to autumn to cultivate it. Terrinca has several among which one stands out both for the vastness of the “Logos”, the woods, the meadows and the significant number; of the huts, both for the presence of the church, the fulcrum of religiosity and the real center of the village.
Notwithstanding the principle that required the construction of houses on land marginal to agriculture, the Oratory was built in the flat and more fertile area, removing it from crops, at the intersection of the main mule tracks, almost in a central position on the mountain pasture.
Already before 1657, at the crossroads formed by the road to Puntato, by the local road of the Carpini hills, by the via di val terra that leads to the Holy Island, by the road of the Barca that leads to col di Favilla, it had been raised, out of devotion , a shrine by Francesco Bacchelli, whose marble bas-relief depicted the Madonna del Rosario, the Child and St. John the Baptist. The aedicule, still visible in the 1810 terrilogio, was demolished in the twentieth century and his Madonna, which remained walled up on the facade of the church sacristy up to the present day, after 1973, like many others, was stolen.
Precisely at this point, as the squat plaque inserted above the central door recalls, the oratory of the S.S. Trinity in 1679
