What does the Council of Trent say about the New Mass?
The Council of Trent (1545-1563) was called to defend the Teaching and Practice (which are both summed up in the one word “Tradition”) of the Catholic Church. The results of this Council, which are infallible, were recorded in Decrees (which explain the Teachings) and Canons (which summarize what must be believed, and which call down anathema, or automatic excommunication, upon those who obstinately refuse to assent to the respective Canons).