1510 – Luther is sent to Rome on monastic business and sees the corruption of the Church.
1517 – Luther posts his 95 theses on a church door in Wittenburg in Germany, formally beginning the Protestant Reformation in Europe:-
The disputation protests against clerical abuses like pluralism, absenteeism, baptism and the sale of indulgences (the idea that people could buy a place in heaven for their souls, and to forgive their sins).
1518 – Luther defends his beliefs in front of Augustinians, and refuses to recant. Frederick the Wise protects him from being handed over to Rome.
1519 – Luther debates papal infallibility and begins a New Testament sermon series.