Answer:
The Protestant Reformation started with the publication of Martin Luther's 95 Theses on 1517. This movement began as a social criticism of different controversial maneuvers of the Catholic Church, such as the sale of indulgences and the abuse of the clergy, evolving towards a proposal for reform in Roman Catholicism from the change in various points of the doctrine of the Catholic Church, based on what Luther understood as a return to the sacred scriptures.
The result of the Protestant Reformation was the division of the so-called Church of the West between Roman Catholics and Protestant reformers, originating Protestantism.