The correct answer to this open question is the following.
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Who was the leader of the Protestant Reformation, and in what city was he tried for heresy?
Answer:
The leader of the Protestant Reformation was Martin Luther, and he was tried for heresy in the city of Worms, Germany, in an event where was known as the "Diet of Worms."
Martin Luther (1483-1546) was a German Theologian that was the most important figure in the Protestant Reformation of the Church. His ideas changed Christianity and led to the separation of the Catholic Church. Luther questioned the main principles of Catholicism. He wrote the document called "95 Thesis" or "Disputation on the Power of Indulgencies," where he critiques the selling of plenary indulgences to forgive sins.