WORLD HISTORY

Detailed explanation-1: -Catholicism and Protestantism are two denominations of Christianity, just like Shia and Sunni are sects of Islam. While the Pope is the head of the Catholic Church, Protestantism is a general term that refers to Christianity that is not subject to papal authority.

Detailed explanation-2: -Calvinism, also known as the Reformed tradition or Reformed Protestantism is a movement which broke from the Catholic Church in the 16th century. Calvinism follows the theological traditions set down by John Calvin, John Knox and other Reformation-era theologians.

Detailed explanation-3: -Protestantism, Christian religious movement that began in northern Europe in the early 16th century as a reaction to medieval Roman Catholic doctrines and practices. Along with Roman Catholicism and Eastern Orthodoxy, Protestantism became one of three major forces in Christianity.