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Protestantism - Wikipedia
Protestantism | Definition, Beliefs, History, & Facts | Britannica
History of Protestantism - Wikipedia
Protestantism summary | Britannica
The Protestant Heritage | Reformation, Beliefs & Impact
Reformation - Wikipedia
The Reformation - HISTORY
An introduction to the Protestant Reformation - Khan Academy
The Protestant Reformation - National Geographic Society
What Is Protestantism & Why Is it Important? - Christianity