The man who began the Protestant Reformation was Martin Luther, a German theologian, and religious reformer. He is known for his 95 Theses, a document he nailed to the door of the All Saints' Church in Wittenberg, Germany in 1517, which criticized various teachings and practices of the Catholic Church. This act and subsequent writings laid the foundation for the movement that challenged the authority and teachings of the Catholic Church and led to the formation of Protestant denominations.
