List of countries in the 1950s
The Sovereign Military Order of Malta was an entity claiming sovereignty. The order had bi-lateral diplomatic relations with a large number of states, but had no territory other than extraterritorial areas within Rome. Although the order frequently asserted its sovereignty, it did not claim to be a sovereign state. It lacked a defined territory. Since all its members were citizens of other states, almost all of them lived in their native countries, and those who resided in the order's extraterritorial properties in Rome did so only in connection with their official duties, the order lacked the characteristic of having a permanent population.