The grand cathedral erected and enlarged by St. Eusebius around the 14th century was radically changed in the sixteenth century by Count Alfieri. Subsequently, from the mid-20th century onwards it underwent many restoration projects which successfully ended in 2012.
The reasons why this building attracts so many visitors are the splendid crucifix in laminated silver and gold, the apse crowned by a huge dome, and the beautiful wooden choir. Moreover, the cathedral houses valuable paintings, especially those by Gaudenzio Ferrari, Giovenone, and Lanino, who were all natives of Vercelli. The 18th-century fa├žade, surmounted by giant statues of the Twelve Apostles and Christ the Redeemer, and the chapels and secondary altars, which include the chapel of the Blessed Amadeus IX of Savoy and the curious Madonna dello Schiaffo (Madonna of the Slap) chapel, are all things tourists should see.