The lower decumanus, commonly called Spaccanapoli, is a road artery in the ancient center of Naples and is one of the most important streets in the city. It is, together with the major decumanus and the upper decumanus (decumani of Naples), one of the three main streets of the urban plan designed in the Greek era and which crossed the entire length of the ancient Neapolis. Given its origin, it would therefore be more appropriate to speak of plateia and not of “decumanus”, a name from the Roman era which by convention has replaced the original. Between the Middle Ages and the nineteenth century, the lower decumanus became important both for the convents of religious orders and for the homes of powerful men who lived there.