Construction began in 1617, near the pre-existing sanctuary of Black Virgin of Oropa, one of the oldest in Piedmont and one of the best known in the region of the Alps. The 12 chapels (plus another seven nearby) are united by a devotional path, and inside these chapels scenes from the story of the life of the Virgin Mary are represented. The minute dimensions and expressions of the characters, the shades and colour tones and the vivid, precise settings of the episodes envelop the visitor in a warm atmosphere which grows from one chapel to the other until reaching Paradise (chapel XV – The Crowning of Mary), on the top of the hill, a Baroque work of art by the brothers Giovanni and Antonio d'Enrico, animated by 156 modelled figures.