History of Paraguay (to 1811) Buenos Aires in 1580, the steady deterioration in the importance of Asunción contributed to growing political instability within the province. In 1617 the Río de la Plata Province was divided into two smaller provinces: Paraguay, with Asunción as its capital, and Río de la Plata, with headquarters in Buenos Aires. With this action, 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 an outpost of Buenos Aires. Located at
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