The basilica in Piekary Śląskie is one of the largest sanctuaries in Silesia, and also one of the better-known centers of Marian devotion across the country. The local Shrine of Our Lady of Charity and Social Justice is primarily known for organizing May pilgrimages for men and August ones for women, whose tradition goes back to the interwar period. Each of them numbers from 80 to 120 thousand pilgrims, mostly from Upper Silesia.