The oldest church of Monjovet and the richest from the point of view of its historical and artistic value, given that it was the parish church for at least five centuries.
It is situated at the exit of the old chief town, on a headland overhanging the Dora, with a road running alongside it that immediately climbs upwards: until the construction of the Mongiovetta (1771), this was only carriageable road that linked the Lower Valley to the valley of Saint Vincent, and therefore, to the rest of the region.
The building of the church, which was originally dedicated to Saint Mary, dates back to the 11th-12th century. The building was however later re-managed on several occasions, it was then demolished and a larger one was rebuilt and re-consecrated on the 2nd of May 1700, when it was dedicated to St. Roch.
The charming bell tower, with its double lancet window openings and hexagonal spire, belongs to the previous church. The interior, with a single nave and ribbed vaults, houses noteworthy works of art. The main altar which dates back to the 17th century, has flanked little fluted columns imitative of a classical style and other Baroque style tortile columns.
In the central alcove, under the dove, there is the fifteenth century statue of the Madonna on the throne with Child, in the side alcoves there are the statues of Saint Gratus (on the left), the bishop of Aosta and patron of the dioceses, and a holy Pope (on the right), in the fastigium, inside the tympanum, a bust of the Eternal Father giving a blessing.
On the left of the main altar there is a large wooden Crucifix, applied to a cross, covered by a thin sheet of metal, attributed to the 14th century.
On the walls that divide the nave from the presbytery, there are two side altars (16th-17th century).
The left hand one is dedicated to St. Nicholas the bishop and houses statues from the sixteenth century: St. Nicholas in the central alcove, St. James the Great and an unknown bishop saint in the side ones, St. Anthony the Great up high in the middle of the tympanum). The right hand one is dedicated to the Madonna of the Rosary, there is a canvas with the Virgin and the saints Dominic, Catherine of Siena, Anthony the Great and Carlo Borromeo, surrounded by panels with the fifteen Mysteries.
The separation between the nave and the presbytery is marked, above, by the beam of the triumphal arch, surmounted by a Crucifix (17th century).
Inside the church there are also two other large painted canvases, one showing the martyrdom of St. Sebastian (17th century), the other depicting the Madonna with Child, between saints Joseph and Anthony of Padua and three angels holding the Shroud, a fresco dated 1742 showing the Madonna of Mercedes and an astylar cross in silver plated copper from the 15th century, rich with symbols, flowers and illustrations of angels and saints.