 By the Treaty of Florence of 28 March 1801, the king of Naples ceded the "Presidi" to the French Republic, which then ceded them to the new Kingdom of Etruria.After the downfall of France in 1814 and the Congress of Vienna in 1815, the territories were granted to the restored Grand Duchy of Tuscany.The "Presidi" were originally certain strategic coastal territories of the Republic of Siena (nominally part of the Holy Roman Empire) that were retained by Spain after the conquest of the Republic.