1800 treaty between France and Spain involving the colonial territory of Louisiana
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 (1800-10-01)[1]
Location
Real Sitio de San Ildefonso
Negotiators
Mariano Luis de Urquijo
Louis-Alexandre Berthier
Parties
First French Republic
Kingdom of Spain
Full text
Treaty of San Ildefonso at Wikisource
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.
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