[pcrh]

The Vatican is surrounded on all sides by Rome. It is on the boundary of Municipio I (historical center) and Municipio XIII (Aurelia), however. So is Municipio I considered the "actual" capital of Italy?

Also, the Vatican is the Holy See (as in seat), not Holy Sea (as in water)...

[jasondavies]

Excellent point. I've removed Vatican City from the map for now, as it is entirely enclosed by another capital city (Rome) and so its Voronoi cell will be tiny.