Third Treaty of San Ildefonso

Third Treaty of San Ildefonso
Preliminary and Secret Treaty between the French Republic and His Catholic Majesty the King of Spain, Concerning the Aggrandizement of His Royal Highness the Infant Duke of Parma in Italy and the Retrocession of Louisiana.
	North America; Louisiana-New Spain in purple
Context	Spain agrees to exchange Louisiana with France for territories in Italy
Signed	1 October 1800
Location	Real Sitio de San Ildefonso
Negotiators	Mariano Luis de Urquijo; Louis-Alexandre Berthier;
Parties	First French Republic; Kingdom of Spain;

The Third Treaty of San Ildefonso was a secret agreement signed on 1 October 1800 between Spain and the French Republic by which Spain agreed in principle to exchange its North American colony of Louisiana for territories in Tuscany. The terms were later confirmed by the March 1801 Treaty of Aranjuez.

^ "Treaty of San Ildefonso : October 1, 1800". The Avalon Project. Yale Law School.

[1] "Treaty of San Ildefonso : October 1, 1800". The Avalon Project. Yale Law School.

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