Thank you for sharing this, I'll make a issue about both.
The Vatican situation is trickier than you'd think, as it's on country level, while Rome is on city level, and naturally you'd want to give countries a priority over cities. Like on low zooms you only want to show countries, then as it gets closer you show cities. Well, except for Vatican.
https://i.postimg.cc/tCn1xSRF/image.png
p.s. very cool project indeed
edit: I don't know how it happened, but while panning the map with the mouse, the map flipped upside down.
https://i.postimg.cc/sggZ2pHh/image.png