What events led Luther to write the Ninety-five Theses?

Martin Luther wrote "The Ninety-Five Theses" because he was dissatisfied with several practices of the Roman Catholic Church, including the sale of indulgences, the abuse of priestly power and the power of the Pope. He also argued that faith, not deeds, is the path to salvation. By making these arguments public, he sparked a religious revolution that came to be known as the Protestant Reformation