Complesso Monumentale San Lorenzo Maggiore

This guide to the Complesso Monumentale San Lorenzo Maggiore in Naples layers a French Gothic basilica raised around 1270 over a Roman street, and beneath that a Greek open-air market that had already been trading for centuries. It traces how the Romans rebuilt the site into a domed macellum with workshops and a public treasury, and how a fifth-century flood buried the whole complex in mud. That burial, oddly enough, is the reason any of it survived at all.