 In 2005, an international team led by architects David Serero, Elena Fernandez and landscape architect Philippe Coignet won the international competition to design a metropolitan park on the former site of the Hellenikon Airport, over more than 300 teams of architects.The competition was sponsored by UIA (International Union of Architects), the Greek Ministry of Environment and the Organization for the Planning and Environmental Protection of Athens (ORSA).The project was further developed in 2006 and 2007 by this team through two development phases with the planning organizations of Athens.