a promontory at the southern end of the Lacus Benacus (Lake of Garda), projecting 22 m. into the lake. It is celebrated from its connexion with Catullus, for the large ruins of a Roman villa on the promontory have been supposed to be his country house. A post-station bearing the name Sirmio stood on the high-road between Brixia and Verona, near the southern shore of the lake. On the shore below is the little village of Sermione, with sulphur baths.