Archaeological excavations in the Mincio valley include a
Bronze Age settlement, some tombs dating to the
Iron Age and some findings associated with the
Etruscan civilization. During the work of river channelling in 1955–56 at Isolone della Prevaldesca (an area near Valeggio) a pile-dwelling settlement came to light which led to the collection of 16,000 finds; some tombs and other finds dating to the
Iron Age were found in
Borghetto (in 1933 a metallic urn dating to the First
Iron Age was found) and some finds associated with the
Etruscan civilization (ornaments and jewellery were found in the Mincio Valley). A large
Celtic necropolis, found in 1984 still partly buried under the current town, would prove the presence of that people from the 4th century BCE and the 1st century CE. In the necropolis were also discovered finds and marble funeral monuments from Roman times, as well as traces of traffic connections linking the ford on the river to consular roads. The creation of the villages of Valeggio and Borghetto dates to the
Lombard rule in Northern Italy because their names derive from 'flat place' and 'fortified settlement' respectively. The monastery of Santa Maria was founded here, on the banks of the Mincio, in the 12th century; later it was a priory of the
Knights Templar. The large medieval fortifications which characterize Valeggio (Scaliger castle, the
Visconti Bridge and the Serraglio defensive line) were built between the 13th and the 14th centuries. In 1405 Valeggio became part of the
Republic of Venice, and subsequently lost its strategic role, becoming an agricultural center and a
silkworms trading market. After the
fall of the Republic of Venice in 1797, Valeggio was included in the
Cisalpine Republic. Later it was part of the
Italian Republic (1802-1805) and then of the
Kingdom of Italy. With Napoleon’s fall, the
Congress of Vienna established the entrance of Valeggio in the
Kingdom of Lombardy–Venetia, an
Austrian Empire dependence. During the
Italian Unification (the 'Risorgimento'), the town was a protagonist of the battles of the
First,
Second and
Third Italian War of Independence, which led to the creation of the
newly unified Kingdom of Italy. In
World War II, on 14 February 1944, an American aircraft
B-17 fell during a dogfight in the locality of Vanoni-Remelli, causing the death of pilot Harold Arthur Bond Jr. and a civilian who was working in the fields near a water canal. Monte Borghetto, on 4 December 1944, was bombarded. The true aim for the attack was the Visconti Bridge. ==Main sights==