Girolamo Savonarola, (1452- 1498), was an Italian preacher and theologian, who sought to reform the church and society in Florence and Italy. He became renowned throughout Italy after his attacks on the immoral and the corrupt clergy and his criticism of the ruling elite in Florence. After the overthrow of the Medici in 1494, Savonarola was the most influential figure in Florence, even though he never held office. His power was short-lived, and he ended his days on the gallows. However, he was a very important figure and was an immensely influential figure in Renaissance Italy and indeed Europe. This article will show that Savonarola was a key figure in the development of both the Reformation and the Counter-Reformation. Uniquely, he was to inspire figures such as Martin Luther and other leaders of the Reformation and also leading figures in the Catholic Church.