Many people had started to think about things which they did not like in the Catholic Church and slips away from the church which caused a split between the Catholic Church and newly formed Protestant churches that Were led by men such as Martin Luther and John Calvin. Pope Paul Ill called the Council of Trent as an attempt to bring all people back to the Catholic church, to prevent further formation of Protestantism and to change parts of the church that affected what people thought about the church. The council of Trent was aimed at classifying the teaching in the Catholic Church especially because many teaching have been confused in the process of the formation of Protestant churches, to discuss Catholic beliefs and to discuss the clergy.