Antiquario, Jacopo an Italian prelate, and native of Perugia, was born near the middle of the 15th century. He was secretary to cardinal Savelli, legate of Bologna, then of the duke of Milan, John Galeazzo Sforza; and was employed ill several important matters. He remained at Milan after it had been conquered by the French, and delivered a discourse, which he pronounced in the name of the people of Milan, on a solemn occasion, and which was published under the title Oratio Jacobi Antiquarii pro Populo Mediolanensi, in Die Triumphi Ludovici Galliarum Regis et Mediolani Ducis de Fractis Vetietis (Milan, 1509). He obtained rich benefices of pope Alexander VI; and distinguished himself by his regularity of morals, his ability, and by the support which he lent on all occasions to people of learning. He died at Milan in 1512. A collection of his Latin letters were printed at Perugia in 1519; several are also found among those of Angelo Poliziano and in other collections. See Hoefer, Nouv. Biog. Generale, s.v.