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Vatican: Lateran Treaty
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As of 31 December 2005 there were 558 people with Vatican citizenship, of whom 246 are dual-citizens of other countries (the majority being Italian). The Lateran Treaty provides that in the event a Vatican citizen has his or her original nationality revoked and ... loses Vatican citizenship, he or she will be automatically granted Italian citizenship.[4]
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In 1929 Benito Mussolini decided to sign an agreement with the Holy See, called the Lateran Treaty, which created the Vatican State. Another treaty gave the Vatican money each year to compensate for the lost territories.
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Terms of citizenship are defined in the Lateran Treaty, and laws concerning the creation of the Vatican state in 1929 sought to restrict the number of people who could be granted Vatican citizenship. The only passports issued by the Vatican are diplomatic passports and service passports.[4]
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Lateran Treaty