Catholicism is the one, the most holy, the most public church handed down from the apostles-the universal archduke Catholic church. κ α θ ο λ ι κ from Greek? , translated as the whole, all or universal. In the early church period, it refers to the whole church of God, regardless of national boundaries, language, race and background. As long as they belong to the Christian church, they are all archduke or universal churches. Together with Orthodox Church and Protestantism, it is called the three major factions of Christianity. It is the Sect with the longest history, the deepest cultural precipitation and the largest number of believers in Christian religion.