Luther and the Protestant Reformation: Crash Course World History #218
What is the Difference Between Catholicism and Protestantism? - Timothy George
What if the Reformation Never Happened?
Religious Divide in Northern Ireland Between Protestants and Catholics: Belfast Burning
Secret Protestant Churches in Donetsk: Ukraine's Religious War
Protestantism is the second largest form of Christianity with collectively more than 900 million adherents worldwide or nearly 40% of all Christians. It originated with the Reformation, a movement against what its followers perceived to be errors in the Roman Catholic Church. Ever since, Protestants reject the Roman Catholic doctrine of papal supremacy and sacraments, but disagree among themselves regarding the real presence of Christ in the Eucharist. They emphasize the priesthood of all believers, justification by faith alone rather than by good works, and the highest authority of the Bible alone in faith and morals. The "Five solae" summarize basic theological differences in opposition to the Roman Catholic Church.