In 1517, the German theologian Martin Luther nailed 95 theses to Wittenberg’s Castle Church door, attacking indulgences, a Catholic practice that, according to church teachings, can reduce or eliminate punishment for sin. Starting in the 11th century, the church offered indulgences to those who joined the Crusades and later sold certificates of indulgences to raise funds, giving rise to the abusive marketing tactics criticized by Luther.
Many people assume that the Catholic Church stopped granting indulgences after Luther’s famous rejection of them. Indeed, nearly 50 years later, Pope Pius V put a stop to their sale. However, Pius V also affirmed the validity of indulgences themselves so long as no money was exchanged. By 1563, he had endorsed a comprehensive doctrine on indulgences that emerged from a series of meetings with high-ranking clergy, called the Council of Trent.
