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The Protestant Reformation
Columbia Encyclopedia (6th ed. 2001-07): Reformation
Introduction to Protestantism: The Reformers, Martin Luther, John Calvin and Ulrich Zwingli
What Started The Protestant Reformation?
Got Questions.Org? What was the Protestant Reformation?
Columbia Encyclopedia (6th ed. 2001-07): Counter Reformation
Believe: Religion Information Souce Web site - Counter Reformation
Counter-Reformation Popes (1559-1655)
The Counter Reformation
CatholiCity: The Counter-Reformation