What happened when martin Luther spoke out against the catholic church?

When Martin Luther spoke out against the Catholic Church in 1517 by posting his Ninety-Five Theses, he challenged practices like the sale of indulgences and called for reforms within the Church. This act sparked the Protestant Reformation, leading to significant religious, political, and cultural upheaval in Europe. Luther's ideas gained traction through the use of the printing press, resulting in the formation of new Protestant denominations and a lasting schism in Christianity. His actions ultimately contributed to the decline of the Church's spiritual and political authority.