Rome is a city… it used to be an Empire… then there was the Holy Roman Empire…
Their is really not a Roman ethicisty… their is a Latin one though. This is closely related to Greek then anything with other Germantic Tribes in the north during these times that all kinda had kingdoms.
So if what your talking about does not exist how can anyone answers the question?
Note you can be Italian citizen but then are your from Rome or Vatican City?
So this is like a bs quest think before you speak.