The protestant reformation came about because of the efforts of many people in and outside the catholic church, with being two of the most prominent and influential.

Martin Luther and Jean Calvin.

Explanation:

Martin Luther was born in Germany. He would initiate the Reformation. He left 95 theses at Wittenberg Cathedral concerning the state of affairs in the church. The most against which Luther rebelled was the sale of forgiveness for sins by the church..Calvin is considered the founder of world Protestantism. He studied theology in Paris but soon switched to law studies. France was not in favor of Protestantism, so Calvin fled to Basel. From Switzerland, he continued his work in spreading the ideas of Protestantism.