The construction of the cathedral, dedicated to Maria Nascente, was sponsored by Bishop Antonio da Saluzzo and began in 1386. The direction of the factory were called several architects who, by Gian Galeazzo Visconti, used the marble of Candoglia fact arrive along the Navigli. The seal AUF (ad usum fabricae) impressed on the sheets it ensured the exemption from import duties. Consecrated in 1418, remained incomplete until Napoleon, there is crowned king of Italy, did add La Madonnina spires in the facade. The approximately 3500 statues that animate the imposing cathedral depict saints, animals, monsters, typical of Medieval figurative repertory.