Genoa is a mix of history and geography, in continuous and close symbiosis between past, present and future. A complex relationship between the evolution and the morphology of the territory, which has always leaned towards that "dark sea, which also moves at night and does not stand still" (P. Conte). Perhaps, indeed, the most correct etymology of the name of the city of ianua, finds its best interpretation in the two-faced figure of the god Janus, in contemporary contemplation between water and earth, as in the bust that represents it and stands on the aedicule of the well of Piazza Sarzano. Very few are the remains still visible of its ancient settlement, in a raised position to control the natural harbor below: the repeated changes in the monumental and social barycentre have radically changed, and repeatedly in history, the privileged axes of the urban structure of the city. Despite the renovations and transformations, this part of the Caruggi of Genoa, is still rarely visited, as if the same Via San Lorenzo constituted a sort of watershed for tourists and Genoese non-residents in the area.