Mr.Koolhaas' CCTV building

The garden turns out to be a blown-up version of Piranesi’s 18th-century map of an imaginary Rome from his engraving series “Il Campo Marzio dell’Antica Roma.” The map represents an urban ideal, one in which the greatness of cities is seen to arise from a clash of architectural visions built up over centuries, and where each of these visions is given equal weight.