The Principality of Seborga (Principato di Seborga) was founded in the 950s as a fiefdom of the Counts of Ventimiglia. In the year 1079, it became a principality of the Holy Roman Empire and, in 1118, Prince Edward announced its independence.
Seborga remained an independent Principality until January 20, 1729, when it was sold to Vittorio Amadeo II, Prince of Piedmont and King of Sardinia. However, this was never registered with the Kingdom of Sardinia.
Later, in 1748, Seborga was not integrated into the Genoa Republic. In 1815, the Congress of Vienna overlooked the village in its efforts to redistribute European territories after the Napoleonic Wars. More importantly, there is no mention to Seborga in the Act of Unification of Italy in 1861.
They have a own currency, the Luigino.
For most Seborgans, this means their city has never been a part of Italy, making it an independent nation.