"Protestantism is the second largest form of Christianity with collectively between 800 million and more than 900 million adherents worldwide or nearly 40% of all Christians.[a] ...
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It originated with the 16th century Reformation,[b] a movement against what its followers perceived to be errors in the Roman Catholic Church. 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 (sola fide) rather than also by good works, and the highest authority of the Bible alone (rather than also with sacred tradition) in faith and morals (sola scriptura). The "five solae" summarise basic theological differences in opposition to the Roman Catholic Church." - (en.wikipedia.org 02.10.2019)