A town of Lombardy, Italy, in the province of Mantua, 20 m. N.W. of Mantua by road. Pop. (1901) 4 122 (town), 5940 (commune). It has an old castle, much altered and restored, especially by the Gonzaga family of Mantua in the 16th century. During the War of the Spanish Succession, the French under the duke of Vendome occupied it; and during the siege of Mantua in 1796, the Austrians under Wiirmser were defeated here by the French under Augereau, who was later created by Napoleon duke of Castiglione.