The Council of Roma Capitale ratified the agreement with the Orchidea Srl fund, establishing the start of the redevelopment of the former Rome Fair complex. The primary objective is to recover a large central area of the city and create an open and integrated environment with the territory, promoting collaboration with Bodies and Institutions, in particular with the University of Roma Tre. The intervention aims at joining private interests with public purposes related to research and experimentation, outlining a model of training and knowledge hub for the benefit of citizens.

The agreement provides for the complete transformation of the site in Via Cristoforo Colombo through the demolition of the buildings and their replacement with new public and private structures. On a total area of about 76,000 m2, of which over 12,000 m2 are reserved for equipped public green areas under the responsibility of Roma Capitale, 35,000 m2 are planned for residential use, of which over 7,000 m2 are dedicated to social housing. In addition, more than 8,800 m2 are planned for non-residential purposes, of which about 6,800 m2 for office services and 2,000 m2 for commercial activities. The project also includes about 27,000 m2 of equipped public green space and about 12,500 m2 of private green areas.

In order to define the executive urban plan, a competition was held to select the Masterplan, which was won by "The City of Joy" project, developed by ACPV Architects, Arup, Asset and P'arcnouveau. The resources from the fund amount to eighty thousand euros: forty thousand euros for the winning proposal and ten thousand euros for each of the first four proposals selected after the winning proposal.

The project, whose title refers to the famous novel by the French writer Dominique Lapierre, proposes the regeneration of this area through a series of interventions, thus developing new synergies and relationships between the public city and the private city, and giving substance and continuity to the interventions provided for by the Urban Planning of Piazza dei Navigatori.

Among other things, it provides numerous green areas and services to promote outdoor, sports and social activities aimed at families and young people, such as picnic areas, areas for events and active spaces for fitness.

50% of the area will be used for green spaces and services, with an increase in soil permeability of around 3.9 hectares of surface area, about half of the total area (7.6 hectares).