It is a single-nave construction with a gabled façade and a semicircular apse decorated with large arches in five groups, joined two by two. The church dates back to the end of the 10th century and is linked to the events of the curtis regia of Barazzola and the Ottonian donation of 962.
The church was used from the end of the 12th century by the Hermits of Saint Augustine, who lived in an adjacent building. Traces of their ‘refectory’ have been preserved.
The bell tower, a symbol of the Middle Ages in Borgomanero, stands next to it. It is about twenty metres high and is made up of large, well-squared stones that form walls with a side of 120 cm. It has single lancet windows with slits and, at the top, lavish windows with trapezoid-shaped capitals.