Council of Trent, 19th ecumenical council of the Roman Catholic Church, held in three parts from 1545 to 1563. Prompted by the Reformation, the Council of Trent was highly important for its sweeping decrees on self-reform and for its dogmatic definitions
Counter-Reformation, the Roman Catholic efforts directed in the 16th–17th century against the Protestant Reformation and toward internal renewal. Learn more about the history, key reformers, educational and missionary endeavors, and legacy of the Cathol