Girolamo Savonarola
From Conservapedia
Girolamo Savonarola (1452-1498) was a Dominican friar in Florence who challenged the authority of pope Alexander VI with fiery sermons and, after his excommunication, saying Mass without authority to do so. His outspokenness against immorality in the Catholic Church and in the powerful Medici family won Savonarola many supporters at first, but eventually the people of Florence turned against him, stormed his monastery, took him prisoner, and then tried, convicted and hanged him.
