Being the capital city of Italy, Rome hosts all the principal institutions of the nation, like the Presidency of the Republic, the government (and its single Ministeri), the Parliament, the main judicial Courts, and the diplomatic representatives of all the countries for the states of Italy and the Vatican City (curiously, Rome also hosts, in the Italian part of its territory, the Embassy of Italy for the Vatican City, a unique case of an Embassy within the boundaries of its own country). Many international institutions are located in Rome, notably cultural and scientific ones – such as the American Institute, the British School, the French Academy, the Scandinavian Institutes, the German Archaeological Institute – for the honour of scholarship in the Eternal City, and Specialized Agencies of the United Nations, such as the FAO. Rome, also hosts major international and worldwide political and cultural organisations, such as the International Fund for Agricultural Development (IFAD), World Food Programme (WFP), the NATO Defence College and ICCROM, the International Center for the Study of the Preservation and Restoration of Cultural Property. Although the economy of Rome is characterized by the absence of heavy industry and it is largely dominated by services, high-technology companies (IT, aerospace, defence, telecommunications), research, construction and commercial activities (especially banking), and the huge development of tourism are very dynamic and extremely important to its economy. Rome’s international airport, Fiumicino, is the largest in Italy, and the city hosts the head offices of the vast majority of the major Italian companies, as well as the headquarters of three of the world’s 100 largest companies: Enel, Eni, and Telecom Italia.