The principles of the “spatial city”, in other words a spanning three-dimensional structure, were drawn up by Friedman in 1958, the year when he imagined “Spatial Tunis”, “Spatial Paris” and, in 1959, Monegasque Venice. This research inspired the visionary “Archigram” projects in London in about 1963, as well as the approach of the Japanese Metabolists in the 1960-1970 period…