Martin Luther questioned the Catholic Church because they sold "get out of hell" cards . This is what sparked the reformation.
Diet of Worms
This is the free card to heavon for the sinful people that paid money to the church or went on Crusades. People thought that they could buy their way to heaven. .
Martin Luther wrote 95 reasons he was upset with the Catholic Church and called it the 95 Thesis. People think that when he sent this to the leaders of the Catholic Church, this is what began he Reformation.
Martin was called to Worms, Germany where he was questioned and the leaders demanded that he take back what he said in his 95 Thesis, he wouldn't so they demanded that he get arrested but he went into hiding.
Martin thought the bible was the highest authority so he translated it into German so lots more people could read it. People started to question the authority of the authority of the Catholic Church.
The more the people read the German bible, the more they became angry with the church so they started to burn buildings and have riots. This lasted 500 years and spread throughout Europe.