The Last Non-Priest Elected Pope

Hello, Pope Leo X! Giovanni di Lorenzo de' Medici was a lowly Deacon when he was elected Pope on March 9, 1513. On March 15th he was ordained a priest, and became a Bishop 2 days later. Not only was he the last non-priest elected Pope, he had a white elephant named Hanno.

Pope Leo X sold indulgences to help pay for the reconstruction of St. Peter's Basilica. Martin Luther took exception to that and well, you know what happened next. I didn't realize that after Luther posted his 95 Theses, Pope Leo issued a Papal Bull requiring all Christians to believe in the pope's power to grant indulgences.