Bernardino of Siena was a 15th-century Italian Franciscan priest and missionary preacher from the Republic of Siena. Born in Massa Marittima in 1380, he became a prominent figure through his extensive preaching tours. He is recognized for his contributions to scholastic economics and his efforts to revitalize Catholicism throughout Italy. Known as the Apostle of Italy, he was canonized in 1450 by Pope Nicholas V.