GUALDO TADINO, a town and episcopal see of Umbria, Italy (anc. Tadinum, on the Via Flaminia, 1 m. to the W.), 1,755 ft. above sea-level, province of Perugia, 22 m. N. of Foligno by rail. Pop. (1931), town, 4,893, commune, 11,889. The cathedral has a good rose-window; and the picture gallery contains 15th century paintings by Umbrian artists. The town is still surrounded by walls. Art pottery is made here. In the plain below, near the ancient Tadinum, Narses defeated and slew Totila 552.