The Council of Trent convened in response to the teaching and rapid spread of the Protestant Reformation. In fact, its primary intent was to condemn and refute every Reformed doctrine. The Council issued numerous decrees and formal statements of Catholic doctrine on topics of salvation, the sacraments, and the canon. This council met for twenty five sessions from 1545 to 1563. The decrees issued at Trent have never been overturned and many were reaffirmed again at the Second Vatican Council during the 1960s.