What was the series of events that led to divisions within Christianity?

(Be sure to explain your answer, this is during the Renaissance and Reformations)

It is known as the Protestant Reformation, or simply the Reformation, the Christian religious movement, initiated in Germany in the sixteenth century by Martin Luther, which led to a schism of the Catholic Church to give rise to numerous churches grouped under the denomination of Protestantism.

The Reformation had its origin in the criticisms and proposals with which various religious, thinkers and European politicians sought to cause a profound and widespread change in the customs and customs of the Catholic Church, in addition to denying the jurisdiction of the pope over all Christendom. The movement will later receive the name of Protestant Reformation, for its initial intention of reforming Catholicism in order to return to a primitive Christianity, and the importance of the Speyer Protest, presented by some German princes and cities in 1529 against an edict of the Emperor Charles V tending to repeal the religious tolerance that had previously been granted to the German principalities.

This movement plunged its roots into elements of the medieval Catholic tradition, such as that of the Alumbrados and the reform of Cardinal Cisneros in Spain, and also the movement of modern Devotion in Germany and the Netherlands, which was an anti-ecclesiastical and centered secular piety in Christ. In addition, the second generation of humanism followed it to a large extent. It began with the preaching of the Augustinian priest Martin Luther, who revised the doctrine of the Catholic Church according to the criterion of its conformity to the Holy Scriptures. In particular, he rejected Catholic sacramental theology, which, according to Luther, allowed and justified practices such as the "sale of indulgences," a sequestration of the Gospel, which was to be freely preached, and not sold.