M. di Campiglio, Pinzolo e Val RendenaSpiazzo.
Spiazzo is a village of recent origins. At the beginning there were only the church, the rectory and a number of service buildings serving the nearby communities of Mortaso, Borzago, Fisto and Chès. Its origin is linked to a sanctuary dedicated to S. Vigilio. Here in fact this bishop of Trentino was probably martyred on June 26 405 during his last missionary journey. According to the tradition where today the high altar of the church of S. Vigilio is situated there was the stone of Saturn which was knocked down by the bishop provoking the strong reaction of the pagan population.
However this place was dedicated to Christian worship. The existence of an early-medieval, or maybe paleo-Christian worship or of a sanctuary, came to light during the excavations in 1961. Under the floor ruins of a Christian room, probably dating back to before the 11th century, were found.