Built on the ParajAuta hill, the small church dates back to the XII Century and, initially dedicated to San Giovanni, in the 16th Century it was dedicated to San Grato, invoked during plagues. Originally the only nave was divided into two spans, anther one was added in the XVII Century and the bell tower was built subsequently. Next to the chapel there is a building (hermitage) used until the beginning of the 20th Century by the hermit, who was in charge of cleaning the church, farming the vineyard and taking care of the adjacent woods.
The structure externally displays a plastered Baroque facade and the rectangular exposed stone apse as side walls. Inside there are preserved frescos and among them, on the sides of the altar, a work from the 15th century attributed to Giacomino da Ivrea that portrays Saint Peter with the keys to Paradise and Saint Andrew with the cross of the same name.