MELEGNANO (formerly Marignano), a town of Lombardy, Italy, in the province of Milan, 11 m. S.E. of that city by the railway to Piacenza, 289 ft. above sea-level. Pop. (1901), 6782. There are remains of a castle of the Visconti. Its military importance is due to its position at the crossing of the river Lambro. It was a stronghold of Milan in her great struggle against Lodi, and is famous for the victory of Francis I. of France over the Swiss in 1515, known as the battle of Marignan, and for the action between the French and Austrians in 1859.