from the XVII century it was the seat of the Confraternity of the Holy Spirit, which played a role of great importance in the political-social life of the epoch. The church was consecrated in 1692 and as is received by us is the expression of the influential brotherhood that in the course of two centuries succeeded to endow it with valuable furnishings and works of art, many of which are preserved in the Collegiate Church.
Worthy of note are the two side chapels of the Crucifix (made in 1693) and the Madonna Addolorata (built in 1697), both the work of the craftsman Carlo Giovanni Zaninetti. The presbytery finally is framed by a balustrade continues the work of Edoardo Arborio Mella and realized in 1850.
The interior is impressive, with cross vaults throughout the sixth, and embellished by the altars of the side chapels in stucco. The first right after the entrance is the rich chapel of Sant'Antonio da Padova, anonymous author, made for an ex-voto in 1650, as stated in the text of the mail folder on time. On its left is the chapel of San Diego, followed by the chapel of San Francesco, richly decorated with stuccoes and frescoes with scenes from the life of the saint. On the other side we find the Chapel of San Bonaventura, decorated with stucco and that of Saint Peter of Alcantara, entirely frescoed.
Climbing the presbytery, through a door on the left you have access to that which was at one time the chapel of the Salus Infirmorum, richly frescoed in the second half of the Seventeenth Century. On the right wall you can admire a pseudo altarpiece depicting the nativity of the Virgin, while on time, beyond a false dome, is represented the coronation of Mary. In San Teonesto Baroque and Romanesque mingle, creating an artistic site only for the history of art in Piedmont.