Third Treaty of San Ildefonso

The Third Treaty of San Ildefonso (short for the 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) was a treaty between France and Spain. In it, Spain gave the territory of Louisiana to France.

Third Treaty Of San Ildefonso Media

• Charles Maurice de Talleyrand-Périgord by François Gérard, 1808.jpg

  Charles Talleyrand, long-serving French Foreign Minister; the Treaty was part of a complex web of related agreements

• Norditalien und Mittelitalien 1799.jpg

  Map of Northern and Central Italy in 1799.

• Mariano Luis de Urquijo (Museo del Prado).jpg

  Mariano Luis de Urquijo, Spanish signatory

• Louisberthier1.jpg

  Louis Berthier, French signatory