who is allowed to live in vatican city
Almost all of Vatican City's more than 450 citizens either live inside the Vatican's walls or serve in the Holy See's diplomatic service in embassies (called "nunciature"; a papal ambassador is a "nuncio") around the world. The Vatican citizenry consists almost entirely of two groups: clergy, most of whom work in the service of the Holy See, and a very few as officials of the state; and the Swiss Guard. Most of the 2,400 lay workers who comprise the majority of the Vatican workforce reside outside the Vatican and are citizens of Italy, while a few are citizens of other nations. As a result, all of the City's actual citizens are Catholic as are all the places of worship.