The Cathedral was begun in 1532 under Duke Francesco II, who commissioned the design to Antonio da Lonate. The edifice was completed in 1606. The interior is on the Latin cross plan, with a nave and two aisles, and houses works by Macrino d'Alba, Bernardino Ferrari and others, as well as tempera polyptych of the school of Leonardo da Vinci.
The Cathedral was begun in 1532 under Duke Francesco II, who commissioned the design to Antonio da Lonate. The edifice was completed in 1606. The interior is on the Latin cross plan, with a nave and two aisles, and houses works by Macrino d'Alba, Bernardino Ferrari and others, as well as tempera polyptych of the school of Leonardo da Vinci.