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Protestantism | Definition, Beliefs, History, & Facts | Britannica
Protestantism - Wikipedia
The Protestant Heritage | Reformation, Beliefs & Impact
The Protestant Reformation - National Geographic Society
The Reformation - HISTORY
Reformation | Definition, History, Summary, Reformers, & Facts
History of Protestantism - Wikipedia
Reformation - Wikipedia
An introduction to the Protestant Reformation - Khan Academy
Protestantism | Encyclopedia.com