Where? In the template: "capital: Rome", and under this "greatest city: Rome". It's not correct, I would like to delete this information. The question is most complicated. Paris, Milan, Naples have a little municipality, only administrative limits, but a great and important metropolitan area: for population, density, etc. Rome has a big municipality (for the crazyness of Mussolini, because he wanted to reconstitute also urbanisticcaly the imperial Rome "the greatest municipality of Europe" (but the agglomeration of Rome is not very important - this is the truth). Example: New York 800 kmq with 8.3 inhabitants, Greater London 1400 kmq with 7.3 inhabitants... You can recognize the crazyness of Mussolini: Rome is 1285 kmq with 2.8 inhabitants, and the density is very low.