Sebastian Maggi was a 15th-century Italian Dominican priest born in Brescia to a noble family. A highly intelligent theologian, he rose through the ranks of the Order of Preachers to lead several religious houses. He is notably remembered for his role as the spiritual director and confessor to prominent figures, including the famous friar Girolamo Savonarola and Catherine of Genoa. Throughout his career, he was known for his strict discipline and his commitment to corporal mortification.