I don't know whether this is correct, as the Vatican itself falls into the Rome diocese and has no separate one. https://en.m.wikipedia.org/wiki/Diocese_of_Rom

I don't know whether this is correct, as the Vatican itself falls into the Rome diocese and has no separate one. https://en.m.wikipedia.org/wiki/Diocese_of_Rome https://en.m.wikipedia.org/wiki/Diocese_of_Rome