The first fifty years of the Low-Income Housing Institute created a veritable “city within a city” to deal with what has been and still remains “the main and persistent problem of Rome”: housing. But what is this city made of? Who gets left out? And why does every witness to the changes of Rome (urbanization, decentralization, expansion) continue to state “I don't understand this city”? What are the needs from 1948 to 2018 that still need expressing? That must yet be shouted from the rooftops? The archives respond. The archives reassert.