FYI my favorite city in the whole world is Rome, not only is it beautiful there is so much history and the food was totally amazing. Unlike most places the Kosher food is generally run by Israelis and not very authentic. In Rome its Italian cooking, Roman Style (In america our Italian cooking is Naples and Scicilian style because thats where the immigrants came from) So Roman cooking is not exactly the same.
Rome is also one of the oldest Jewish communities in the world, Its likely excpet between 1943-1945 there probably has been a shabbos minyan in ROme since the time of the second Beis Hamigdosh. Very few cities if any can make that claim.