Portrait of Fra Lorenzo da Bergamo, 1542. The Dominican preacher Fra Lorenzo from the city of Bergamo, Italy. Dressed in the robes of his order, Fra Lorenzo is linked with St. Thomas Aquinas by his halo and the lily he holds, symbolic of purity. The 13th-century Dominican saint was among the most important theologians in the West. By appearing in the guise of a saint, the sitter has revealed his pious and intellectual aspirations.