The document summarizes the key events and causes of the Protestant Reformation between 1500-1600. It discusses Martin Luther posting his 95 Theses in 1517 criticizing Catholic Church corruption like selling indulgences which sparked the Reformation. It then covers the spread of Protestantism throughout Europe led by figures like Zwingli and Calvin and responses from the Catholic Church like the Council of Trent and founding of the Jesuits. Political impacts in countries like England and Germany are also summarized.