It started as a joke by a French internet user and influencer - who identifies himself as Gaspardo - about the lack of geographic knowledge of North Americans -, but quickly gained life, with an anthem, currency, flag and... entry in the Paris Olympic Games.

But there are more interesting facts about Listenbourg. And one of them is that it borders Portugal - having 'swallowed' part of the North and Minho.

The joke went (even) further, with an alleged national anthem and flag appearing on Twitter.

Listenbourg is also part of the Formula 1 Grand Prix circuit, as well as having astronauts on a mission to the moon.