(1475 - 1521; r. 1513 - 1521) A son of Lorenzo de Medici whose papacy included the beginning of the Protestant Reformation. He revived the unpopular sale of indulgences to fund the construction of St. Peter's Basilica. Martin Luther responded by publishing his 95 Theses, which Leo denounced in the papal bull Exsurge Domine. At his coronation, Leo was given a white elephant named Hanno by Manuel I of Portugal; the animal was buried beneath the Vatican after its death.