Sealand country on platform

The smallest country in the world is located on the former Fort Roughs anti-aircraft platform. Its name is Sealand. The total area is 560 m2 (40m x 140m).
It was established in 1967, when an abandoned platform was occupied by Roy Bates, who declared himself a prince. Despite its constitution, flag, coat of arms, anthem and currency, Sealand is not considered a sovereign state in the international arena. However, it is worth knowing about its existence.
The founder’s son, Michael Bates, put the country up for sale in 2007. For only $100,000,000,000 you can become his new prince.