First Treaty of San Ildefonso

First Treaty of San Ildefonso
Treaty of Peace and territorial limits between Spain and Portugal.
Royal Palace of La Granja de San Ildefonso, where the Treaty was signed
ContextSpain and Portugal settle territorial disputes in the Río de la Plata region
Signed1 October 1777 (1777-10-01)
LocationRoyal Palace of La Granja de San Ildefonso
Negotiators
Parties

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.