 Traces of human presence in the Bronze Age have been found in Gazzaniga.The first document attesting the existence of a burgh (castle) dates from 476 AD, when the Barbarian king Odoacer ransacked it.In the Middle Ages Gazzaniga was part of the Confederazione de Honio together with neighbouring communes; in 1397 Gazzaniga was destroyed by the Ghibellines, and again by the Guelphs in the next year.