The Sanctuary can be found in the upper part of the residential area of Bonarcado, next to the Romanesque church of Santa Maria. Its name originates from the Medieval “Bonarcanto” or “Bonacranto”, a word in turn deriving from the primitive title of the sanctuary dedicated to the “panachrantos” or “immacolata” Virgin.
Its construction dates back to the VII-VIII century and made use of part of a late-Roman building, perhaps thermal baths, floor mosaic fragments of which were discovered. It underwent numerous renovations over time. The western facade dates back to the Romanesque period and is widely decorated with small arches and ceramic bowls while the northern facade dates from the 1933 and is in Neo-Romanesque style.
It has a cross-shaped layout with the cupola at the intersection of the arms. A terracotta panel of the Madonna with Child is kept on the altar, a work produced between 1350 and 1400 and attributed, following recent restoration, to the school of Donatello.
