History of Paraguay its capital, and Río de la Plata, with headquarters in Buenos Aires. With this decision, Asunción lost control of the Río de la Plata estuary and became dependent on Buenos Aires for maritime shipping. In 1776, the crown created the Viceroyalty of Río de la Plata; Paraguay, which had been subordinate to Lima, now became a provincial outpost of Buenos Aires. Located at the periphery of the empire, Paraguay served as a buffer state. The Portuguese blocked Paraguayan territorial expansion in the north, native tribes blocked it – until their expulsion – in the south, and the Jesuits blocked it
San Pedro Department, Paraguay points. By the Jejuí River, there is a spring, the Ykua Mandyju, which has white sand beaches. In Itacurubí del Rosario, there is another spring, the Ykua Salas, very frequented by tourists. Laguna Blanca, in the district of Santa Rosa del Aguaray, is an ecologic and tourist point, where there is a lake with completely transparent water. In San Estanislao is the House of Culture and Historical Museum, which was the first Jesuit school, before becoming a barrack for the Marshall López, during the Paraguayan War. San Pedro Department, Paraguay San Pedro () is a department of Paraguay. The capital