March 15, 1517: Needing money to rebuild St. Peter's basilica, Pope Leo X announces a special sale of indulgences. A Dominican named Johann Tetzel led the way in promoting the sale in Germany and erroneously declared that indulgences would cover future sins (Leo's forgave all past sins). The teaching angered monk Martin Luther, who soon posted his 95 Theses in response (see issue 34: Luther's Early Years).
March 15, 1672: Charles II issues his first declaration of indulgence, suspending Parliament's legislation against Catholic and Protestant dissenters. He was soon forced to rescind the declaration, however, and the following year issued the Test Act, which drove Catholics out of public office.
March 15, 1953: Billy Graham holds his first integrated revival in Chattanooga, TN. Up to this point Graham accommodated southern whites by holding segregated revivals when in the South.