What was the capital of the union of provinces in the Río de la Plata comprised by most of the former dependencies from the last to be organized and also the shortest-lived of the Viceroyalties of the Spanish Empire in the Americas?
Viceroyalty of the Río de la Plata The Viceroyalty of the Río de la Plata (Spanish: "Virreinato del Río de la Plata" ) was the last to be organized and also the shortest-lived of the Viceroyalties of the Spanish Empire in the Americas.
Viedma, Río Negro Viedma (] ) is the capital and fourth largest city of the Río Negro Province, in South-Central Argentina. The city has 47,246 inhabitants (2001), and is located on the southern margin of the Negro River, about 30 kilometres off the Atlantic Coast, and 960 km from the city of Buenos Aires on the National Route 3.