The strongest fortress in Italy, in SE. Lombardy, on two islands in the river Mincio, 83 m. E. of Milan, is a somewhat gloomy and unhealthy town, with many heavy mediæval buildings; there are saltpetre refineries, weaving and tanning industries. Virgil was born here in 70 B.C. The town was Austrian in the 18th century, but ceded to Italy 1866.