Charles Emmanuel I, Duke of Savoy
In 1612 a brief text was published in the same city, by Girolamo Cordieri, canon of the cathedral chapter of Mondovi, extolling the holy Amadeus. Cordieri was later appointed theologian to Charles Emmanuel I, Duke of Savoy. Also that year, a canon from Vercelli published a compendium of miracles attributed to the intercession of Amadeus IX. The cultus of Amadeus was actively promoted by Charles Emanuel's son, Prince Maurice of Savoy, Cardinal of Vercelli.