Girolamo Savonarola (jērō´lämō sävōnärō´lä), 1452–98, Italian religious reformer, b. Ferrara. He joined (1475) the Dominicans. In 1481 he went to San Marco, the Dominican house at Florence, where he became popular for his eloquent sermons, in which he attacked the vice and worldliness of the city, as well as for his predictions (several of which, including the death date of Innocent VIII, turned out to be true). In 1491 he became prior of San Marco, and after the death of Lorenzo de' Medici, who was his enemy, and the subsequent exile of the Medici (1494) he became the real spiritual ruler of the city. He was uncompromisingly severe in his condemnation of what he considered the paganism of the times and called for a regeneration of spiritual and moral values and a devotion to asceticism. When Charles VIII of France invaded Italy in 1494 (as Savonarola had predicted), Savonarola supported him, hoping that Charles would lead the way to the establishment of a democratic government in Florence and to the reform of the scandalously corrupt court of Pope Alexander VI. Alexander, understandably infuriated, ordered Savonarola to refrain from preaching; however, he continued to preach, and the pope excommunicated him for disobedience in 1497. Savonarola now declared Alexander no true pope, being elected by simony. The people of Florence, who had for a time staunchly supported Savonarola, tired of his rigid demands. Hostility toward him grew, led especially by local Franciscans, and in Mar., 1498, the government, threatened by a papal interdict, asked him to stop preaching. His ruin came suddenly when one of his disciples accepted an ordeal by fire to prove Savonarola's holiness. Rain prevented the event. Nevertheless, there were riots, and Savonarola and two disciples were arrested by the city. Under torture he confessed to being a false prophet, or so it was announced. The three were hanged for schism and heresy; papal commissioners had passed on the sentence, which was assured by Alexander's vindictiveness.
See biographies by P. Villari (2 vol., tr. 1888; repr. 1972), R. Ridolfi (1959), and R. R. Renner (1965); study by D. Weinstein (1970).