The document provides an overview of the causes and key events of the Protestant Reformation. It discusses corruption in the Catholic Church, the impact of Renaissance humanism, influential religious reformers like Wycliffe and Huss, and resentment from secular rulers over papal power. It then focuses on Martin Luther and his 95 Theses opposing indulgences in 1517, which helped spark the Reformation. Other reformers like Zwingli and Calvin established new Protestant doctrines and sects. The spread of Lutheranism and religious wars in Germany are also summarized.