Luther Posts 95 Theses: Reformation Ignites

Martin Luther, an Augustinian monk and theology professor at the University of Wittenberg, nailed a document containing 95 propositions to the door of the Castle Church on October 31, 1517, challenging the Catholic Church's sale of indulgences and unwittingly detonating the Protestant Reformation. The theses were written in Latin and addressed to fellow academics, not to the general public. Luther expected a scholarly debate. He got a revolution. The immediate target of Luther's anger was Johann Tetzel, a Dominican friar who had been traveling through Germany selling indulgences with the slogan, "As soon as a coin in the coffer rings, a soul from purgatory springs." Indulgences were certificates issued by the pope that promised to reduce the time a soul spent in purgatory after death. The practice had existed for centuries, but by 1517 it had degenerated into a crude fundraising operation. Half the proceeds from Tetzel's sales went to the construction of St. Peter's Basilica in Rome; the other half went to repay the debts of Archbishop Albrecht of Mainz, who had borrowed heavily from the Fugger banking house to purchase his office. Luther's theses attacked the theology behind indulgences, arguing that the pope had no authority over purgatory and that true repentance could not be purchased. Several propositions directly challenged papal power: "If the pope knew the exactions of the indulgence preachers, he would rather that the basilica of St. Peter were reduced to ashes than built with the skin, flesh, and bones of his sheep." Luther had intended the theses as an invitation to academic disputation, a standard university practice. But the recently invented printing press transformed them into a mass media phenomenon. Within weeks, the theses had been translated from Latin into German and reprinted across the Holy Roman Empire. Luther found himself at the center of a movement far larger and more radical than he had envisioned. The Catholic hierarchy responded with escalating threats. Pope Leo X issued a papal bull in 1520 demanding that Luther recant. Luther publicly burned it. The Diet of Worms in 1521 declared him an outlaw. Frederick the Wise of Saxony hid him in Wartburg Castle, where Luther translated the New Testament into German. By the time of Luther's death in 1546, Protestantism had split Western Christianity permanently, reshaped European politics, fueled decades of religious warfare, and established the principle that individual conscience could challenge institutional authority.