The church of San Bernardo was built in the first half of the eighteenth century on the remains of a pre-existing medieval building, dedicated to the same Saint. The community of Deglio played a significant role for a long time in the management of water, essential for agriculture and local roads. Among the most significant documents is that of Battista Girimondo, who in the seventeenth century established the annual celebration of masses in suffrage of his own soul, a tradition maintained for over a century.

The construction of the current building predates 1733, the year it was elevated to a parish; it was subsequently embellished with stucco decorations. From the older church, the altarpiece of San Bernardo remains, adapted to the dimensions of the new building.

The facade, while conceived according to the Baroque models of the time, remained unfinished due to a lack of resources, despite the dimensions designed to confer greater monumentality.

The interior houses five altars, including that of the Madonna del Rosario and that of Saint Anthony of Padua, created in 1761 by Agostino De Ferrari. Of particular interest is also the fresco of the “Apparition of the Madonna to San Bernardo,” executed in 1791 by Tommaso Carrera.