The document summarizes the key events of the Protestant Reformation in Europe during the 16th century. It discusses factors that led to the Reformation such as corruption in the Catholic Church. It then outlines the main figures of the Reformation like Martin Luther who posted his 95 Theses criticizing indulgences, and John Calvin and his Calvinist doctrine. The response of the Catholic Church to the Reformation through movements like the Jesuits and the Council of Trent is also summarized.