Upon the designation of the Viceroyalty of the Río de la Plata by the Spanish Empire in 1776, the "Road of the Kingdom of Heaven" leading into Buenos Aires from the east was designated a Camino Real, a "Royal Road" fit for a Viceroy, and afforded improvements and some security.
In 1750, he signed the agreement between Spain and Portugal that finished the disputes over the borders of Río de la Plata and Brazil; Colonia del Sacramento returned to Spain in exchange of some Paraguayan territories.
Rio de Janeiro | Rio Grande do Sul | Rio Grande | Rio de Janeiro (state) | Mar del Plata | La Plata | Rio Grande do Norte | Río de la Plata | Rio | Rio Tinto Group | Rio Negro | Natal, Rio Grande do Norte | Puerto Plata | Rio Tinto | Estudiantes de La Plata | Rio Negro (Amazon) | Rio Grande Valley | Pinar del Río | Río Piedras, Puerto Rico | Rio Branco | Pinar del Río Province | Rio Ferdinand | Universidade Federal do Rio Grande do Sul | Río Negro | Del Rio, Texas | Rio Tinto Alcan | Río Piedras | Río Negro Province | Río Cuarto, Córdoba | Resende, Rio de Janeiro |
Bolivian and Chilean historians disagree on whether the territory of Charcas, originally part of the Viceroyalty of Peru, later of the Viceroyalty of the Río de la Plata and ultimately of Bolivia, included access to the sea.
Gualeguay was founded on March 20, 1783, by a military surveyor, Tomás de Rocamora, sent by the Viceroy of the Río de la Plata, Juan José de Vértiz y Salcedo.
In 1809 he took command of the Peruvian royalist armies in Upper Peru, sent to suppress the revolutionary forces at La Paz, even though this province belonged the Viceroyalty of the Río de la Plata.
Sobremonte is the last name of Rafael de Sobremonte, 3rd Marquis of Sobremonte, viceroy of the Viceroyalty of the Río de la Plata.