Answer:
 The teachings of prominent figures of the Protestant doctrine.
Step-by-step explanation:
John Wycliffe: With his dedication, he emphasized that the supreme authority of the church is Jesus Christ, not the pope. 
Jan Hus: It demanded a more modest life for church authorities. He is seeking to translate the Bible into the vernacular. Because of his public appearances, he was burned at stake. 
Desiderius Erasmus: He opposed the immorality and debauchery of church officials. He expressed his views in work "Praise for Madness". One of the representatives of Humanism, 
Martin Luther: He opposed the sale of forgiveness for sins, which the church issued for a certain amount of money. 
John Calvin: Stated that biblical authority must supersede church tradition. He advocated greater religious freedom.