The Sovereign Military Order of Malta is the most exclusive entity and it grants passports to just three people in the world; all of which are members of the Catholic order.
The chosen few in possession of the prized passport include the grand master, deputy grand master, and chancellor of the order.
While twelve individuals also hold temporary passports for the length of their five-year term.
The Catholic order, which had its sovereignty recognized by Pope Paschal in 1113, is one of the oldest institutions in Christian civilization.
It is a neutral, completely apolitical body that primarily concerns itself with humanitarian issues - at the moment, for example, it is heavily involved in providing medical assistance to refugees crossing the Aegean Sea to Europe.
Since losing the island of Malta in 1798, this military order's sovereign land is restricted to two extra-territorial properties in Rome, from where it issues its own postage stamps, currency and passports.
Unfortunately, despite the passports’ rarity, it won’t get you far if you are one of the owners though.
Many countries do not accept the Order’s passport as a legitimate form of identification including UK, US and New Zealand.
However, Czech Republic, Germany, Spain, Italy, Latvia, Hungary, Austria, Malta, Poland, Portugal, Slovenia and Slovakia do.