Why does one need a visa to visit the Vatican?

There is an open border between Italy/Rome and Vatican city, no visa is necessary and there is nobody there to check passports. Nor do they ask, nor care how much money you have nor whether or not you are Catholic. read more

One need, eventually, a VISA to come to Italy, and from Italy to go to the Vatican. The access to the Vatican itself is not regulated with VISA. read more

You don't have to have an international passport and you don't have to have a visa if you don't plan on visiting other countries; if you do, you need to comply with the requirements of those countries, and provide passport/visa combination. read more