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The Protestant Reformation that began with Martin Luther in 1517 played a key role in the development of the North American colonies and the eventual United States.

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The Protestant Reformation explained (explainity® explainer video)

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Power Struggles of the Holy Roman Empire Popes vs Emperors

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https://courses.lumenlearning.com/atd-herkimer-westerncivilization/chapter/the-investiture-controversy/

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Martin Luther | Biography, Reformation, Accomplishments, Quotes, & Facts

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Martin Luther, German theologian and religious reformer who initiated the Protestant Reformation in the 16th century. Through his words and actions, Luther precipitated a movement that reformulated certain basic tenets of Christian belief. Learn about his life, education, writings, excommunication, and legacy.

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Change the layout to brick pattern.