There are over 160 million valid U.S. passports currently in circulation, making it one of the most common documents of its kind in the world. On the flip side, some passports are far more exclusive, and have only been issued to a handful of individuals. One such document stands out above the rest. Only 500 people hold one, and it isn’t issued by a specific country, but rather by a sovereign religious order that’s existed for nearly 1,000 years.
— Read on dailypassport.com/rarest-passport-in-world/