The Cammino mariano delle Alpi pilgrimage route is an important religious, cultural and tourism-driven project in Valtellina. Tracing a route through the valley, the hiking itinerary incorporates several shrines to the Virgin Mary before reaching the Basilica of the Madonna di Tirano — the most significant sacred monument in the province and proclaimed the ‘celestial patroness of all of Valtellina’ by Pope Pius XII in 1946.