Some scholars claim leab plumbing. 'Course, about the only thing the ancient Latins and modern Italians have in common is the address anyway. Different peoples, same geography.

AFAIK Vatican is a fully sovereign independent nation quite separate from the state of Italy, so obviously it is unlikely to be directly involved in a purely Italian legal case. Most nation-states are going to get very irritated if a foreign sovereign power tries to meddle in their internal legislations anyway.