Buenos Aires can now be considered "The Capital of an Empire that never existed....." It has been thought for what Buenos Aires became in the new millennium: a primary central node in the communication network of the World. This project could be the main place where the whole information of Argentina might be kept... researchs in political, social or economic data. True and false statistics. The futurist profile (soflty) evolves giving the impression of a changing environment: the multi-funcional approach allows to develop flexible programmes. A city within a building is looking for the Twenty-first Century.