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.
Map showing 11 major regions of the US at the start of the 19th century and dates of when they entered the union
North America; Louisiana-New Spain in purple
ContextSpain agrees to exchange Louisiana with France for territories in Italy
Signed1 October 1800 (1800-10-01)[1]
LocationReal Sitio de San Ildefonso
Negotiators
Parties
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.

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