First Treaty of San Ildefonso

First Treaty of San Ildefonso

Treaty of Peace and territorial limits between Spain and Portugal.
Palacio La Granja, where the Treaty was signed
Context	Spain and Portugal settle territorial disputes in the Río de la Plata region
Signed	1 October 1777 (1777-10-01)
Location	Real Sitio de San Ildefonso
Negotiators	Count of Floridablanca D. Francisco Inocêncio de Sousa Coutinho
Parties	Kingdom of Portugal Kingdom of Spain

The First Treaty of San Ildefonso was signed on 1 October 1777 between Spain and Portugal. It settled long-running territorial disputes between the two kingdoms' possessions in South America, primarily in the Río de la Plata region.