how does st peters basilica relate to pope leo x and indulgences

Pope Leo X was the pope who authorized the sale of indulgences in 1517, which sparked the Protestant Reformation. St. Peter's Basilica was the site of the papal bull that authorized the sale of indulgences, and it was also the site of the papal bull that ended the sale of indulgences in 1520. Thus, St. Peter's Basilica is closely associated with Pope Leo X and indulgences, as it was the site of the papal bull that authorized the sale of indulgences and the papal bull that ended the sale of indulgences.