In the early sixteenth century, the Reformation put an end to the relative unity that existed for thousands of years in Western Christendom under the Roman Catholic Church. The Reformation, which started in Germany and spread throughout Europe, was a response to the growing sense of corruption and abuse in the church. It showed vision of Christian practice, which led to the creation and rise of Protestantism. Pictures became tools for showing negative images of the church and for popularizing Reformation ideas. In the beginning of the 16th century, numerous events led to the protestant reformation. Clergy abuse caused people to begin criticizing the Catholic Church. The greed and scandalous lives of the clergy had created a split between them and the peasants. The birth of the reformation was created by the German Augustinian monk Martin Luther. In 1517 he nailed it to a church door a list of ninety-five arguments against the abuse of indulgences. They were pardon for sins given after guilt was forgiven through penance. It gave sinners a way to buy their way into heaven which, from the start became common practice.