Corviale is one of Italy’s biggest postwar public housing projects and, arguably, one of the most controversial. Both revered and abhorred, the complex remains a pilgrimage site for architectural schools from around the world. Il Serpentone (The Big Snake), as it is affectionately called, stretches nearly a kilometer in a straight line, a monolithic, brutalist building that hovers over the countryside on the outskirts of Rome. But there is nothing sinuous about a construction made up of 750,000 square meters of reinforced concrete condensed into 60 hectares. This hulking horizontal skyscraper is formed by twin structures, each 30 meters high, connected through labyrinths of elongated hallways, external corridors, and inner courtyards. Divided into five housing units, each with its own entrance and staircase, it contains 1,200 apartments and houses up to 6,000 people.