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.
In the Spring of 1536, John Calvin, a famous Protestant reformer, traveled from Ferrara to Aosta on his way back to France. His sermons in Aosta brought him under Bishop Pietro Gazino's scrutiny and forced him into exile. The Council of Trent advised bishops everywhere to attempt to restore Roman Catholicism.