This was known as the "Tridentine Mass", from the city's Latin name Tridentum.
The council also commissioned the first Catholic catechism, the Roman Catechism. The Council of Trent was a major first step in the Counter-Reformation. The main object of the council was twofold, although there were other issues that were
Catholic Church on all disputed points.
The history of the council is divided into three distinct periods: 1545–49, 1551–52 and 1562–63. It closed with "Anathema to all heretics, anathema, anathema."
Dear born-again, Bible-believing, evangelical Christian, YOU are a heretic in the eyes of Rome !