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