It had barracks for 2,000 men. The Prince of Piombino, who shared territorial sovereignty over Elba with the Duke of Tuscany, ceded his authority over the thirteen square kilometres of Porto Longone to the Spanish. This was the only case of territorial expansion in the history of the Presidi.
The fortress had barracks for 2,000 men. The Prince of Piombino, who shared control of Elba with the Duke of Tuscany, gave up his authority over the thirteen square kilometers of Porto Longone to Spain. This was the only instance of territorial expansion in the history of the Presidi.