The document summarizes the spread of Protestantism across Europe beginning in the 15th century with Martin Luther and the printing press. Key events included Luther posting his 95 Theses in 1517, the Peasant Revolt of 1525, and the Peace of Augsburg in 1555 which recognized Lutheranism. John Calvin furthered Protestantism, establishing a theocracy in Geneva. The Thirty Years War broke out in 1618 between Catholic and Protestant states and devastated Europe. The 1648 Treaty of Westphalia ended the war and divided Europe along religious lines.