A hosting company set up shop on Sealand, a self-declared principality on an old fort off the coast of England...
A hosting company once tried to put its servers beyond the reach of governments by moving them onto a sea fort. Wikipedia says HavenCo was founded in 2000 to operate from Sealand, an unrecognised self-declared principality that occupies HM Fort Roughs off the coast of England.
The pitch was simple.
The Volokh Conspiracy describes HavenCo as offering an offshore hosting site for data of any kind, safe from governmental snoops, censors, and prudes. Grimmelmann writes that HavenCo built out Sealand as a data center, moving in computer servers and connecting them to the Internet, and that the idea was a data haven that would store content illegal in other countries.
The country was a fort.