A huge warehouse (horreum) in which to store army victuals was built at the end of the third-beginning the fourth century A.D., to supply the troops stationed in Milan and nearby areas. A decentralized area to the North of the city was chosen, close to major roads and the urban city walls, surrounded by the ditch, which made it easier to bring in supplies from outside. The Milanese Horreum is one of those rare archaeological testimonials to the great infrastructure network set up to supply the Armies, positioned at strategic points to the Empire.