 Over the centuries, thanks to the fertilization work of local farmers and the construction of artificial canals in the surrounding areas, the "sangiorgese" territory has been made arable.Once vast areas were cultivated and the flora of the wooded areas was composed mainly of oaks, hornbeams, chestnuts, common hazels, planes, ashes, poplars, elms, maples and alders.The oldest archaeological records found in the territory of San Giorgio su Legnano are made up of Roman necropolises, the dating of which corresponds to the imperial age (1st century BC-4th century).