It is known that, in the Spring of 1536, John Calvin himself, the famous Protestant reformer, visited Aosta as he was returning to France from Ferrara. His preaching, however, brought him to the attention of Bishop Pietro Gazino of Aosta, and he was forced to flee. The Council of Trent called upon bishops everywhere to attempt to restore Roman Catholicism.
It is known that, in the Spring of 1536, John Calvin, the renowned Protestant reformer, visited Aosta as he was returning to France from Ferrara. His sermons, however, drew attention from Bishop Pietro Gazino of Aosta, and he had to flee. The Council of Trent urged bishops worldwide to work towards restoring Roman Catholicism.