distance of . It will partly replace the existing Termini-Pantano rail line. It will feature full automated, driverless trains. The first section with 15 stations connecting Pantano with the quarter of Centocelle in the eastern part of the city, opened on 9 November 2014. The end of the work was scheduled in 2015, but archaeological findings often delay underground construction work. A fourth line, D line, is also planned. It will have 22 stations over a distance of . The first section was projected to open in 2015 and the final sections before 2035, but due to the city's financial crisis, the project has been put on hold. Above-ground public transport in Rome is made up of a bus, tram and urban train network (FR lines). The bus, tram, metro and urban railways network is run by Atac S.p.A. (which originally stood for the Municipal Bus and Tramways Company, Azienda Tramvie e Autobus del Comune in Italian). The bus network has in excess of 350 bus lines and over eight thousand bus stops, whereas the more-limited tram system has of track and 192 stops. There is also one trolleybus line, opened in 2005, and additional two lines were opened. International entities, organisations and involvement Among the global cities, Rome is unique in having two sovereign entities located entirely within its city limits, the Holy See, represented by the Vatican City State, and the territorially smaller Sovereign Military Order of Malta. The Vatican is an enclave of the Italian capital city and a sovereign possession of the Holy See, which is the Diocese of Rome and the supreme government of the Roman Catholic Church. For this reason, Rome has sometimes been described as the capital of two states. Rome, therefore, hosts foreign embassies to the Italian government, to the Holy See, to the Order of Malta and to certain international organisations. Several international Roman Colleges and Pontifical Universities are located in Rome. The Pope is the Bishop of Rome and its official seat is the Archbasilica of Saint John Lateran (of which the President of the French Republic is ex officio the "first and only honorary canon", a title held by the heads of the French state since King Henry IV of France). Another body, the Sovereign Military Order of Malta (SMOM), took refuge in Rome in 1834, due to the conquest of Malta by Napoleon in 1798. It is sometimes