The Sanctuary complex is not located in the place where the miracle took place, but is positioned on a hill that stretches further over Bellano and from which you can enjoy an incredible view on the water below. It is a church with a central plan, very compact externally, with a very deep presbytery and an upward-sloping facade. The latter possesses the forms of a mature Baroque, light and simple, typical of the late 1600s. It is tripartite with the two lower lateral portions, framed by pilasters on a podium supporting a very pronounced entablature, connected to the central portion by elegant curved lines. The pilasters, in turn, frame two niches containing the statues of St. Peter and St. Paul. In the center there is a large stone portal surmounted by a broken tympanum which projects one’s gaze towards the large window whose stained glass portrays the Coronation of the Madonna and the images of Cardinal Montini, Pope John XXIII and Monsignor Diego Venini, donor of the work. The facade ends with a sinuous gable and is flanked, on the right, by a bell tower whose base appears to be incorporated into the structure of the church and which has been raised over the centuries.
The interior of the Sanctuary has a single nave and is rich in marble, stucco and paintings made in different periods. The high altar, dedicated to the Virgin and originally placed further on, is provided with a sort of ambulatory with walls lined with Ex Voto that, increasing in height in the center, leads to the niche where the miraculous effigy is kept, placed in a golden shrine held by six golden bronze angels. There are many types of marble used on the altar, among which black Varenna marble stands out, especially in the frames, in the steps and in the balustrades, also on the minor altars; while the walls are frescoed with a landscape of loggias and colonnades. Natural light filters through two illustrated windows placed at the sides, while the other in the center comes from a large thermal window whose panes reproduce the scene where Bartolomeo Mezzera was facing the Miracle. The vaults of the high altar are also frescoed with scenes of the Coronation and Exaltation of the Virgin, while the arches are decorated with angels and saints.