Andorra, a small nation of roughly 60,000 people wedged between France and Spain in the Pyrenees Mountains, formally joined the United Nations, gaining full international recognition of its unusual status as a co-principality jointly headed by the President of France and a Spanish bishop, the Bishop of Urgell.
Andorra's political arrangement dates back to a 1278 pareage agreement settling a dispute between the Count of Foix and the Bishop of Urgell, creating a system of joint sovereignty that persisted, almost unchanged in principle, for over 700 years. By the time of UN admission, the French co-prince role had passed to the French presidency itself.
The country adopted its first modern constitution only in 1993, the same year as its UN admission, formally establishing itself as a parliamentary co-principality with clearly defined democratic institutions, judicial independence, and human rights protections, modernizing a governance structure that had remained largely feudal in character for centuries.
Andorra's UN membership reflected a broader wave of small and previously anomalous states gaining full international standing in the post-Cold War era, joining Monaco and San Marino among Europe's tiny surviving principalities securing formal recognition on the world stage.