Potosí Silver Mining System

Timeline

1. 1545–1555Cerro Rico, Potosí · BoliviaIn 1545, the indigenous Diego Huallpa discovered rich silver ore in the Cerro Rico range; Spanish colonial authorities quickly intervened, smelting with traditional furnaces (huayra), and initial output was already considerable. The town of Potosí rapidly expanded into a colonial city within a few years.
2. 1554–1580Potosí and Huancavelica · Viceroyalty of PeruIn 1554, Bartolomé de Medina introduced the patio process to New Spain, later extending it to Potosí. In 1572, Viceroy of Peru Francisco de Toledo standardized production flows, integrating the Huancavelica mercury mines with the Potosí silver mines into a coordinated system, and conscripted indigenous labor through the mita system, causing output to surge.
3. 1601–1610Potosí · BoliviaBetween 1601 and 1610, Potosí silver mines were at their historical production peak, yielding roughly 150–220 tons of pure silver annually, over 50% of global silver output. Tens of thousands of indigenous people served under the mita forced-labor system, and the mining city's population exceeded 100,000. Silver was carried by mule trains to Lima and Buenos Aires, shipped to Europe, and flowed into the Chinese market through the Manila galleon trade, becoming a core driver of the global Price Revolution.
4. 1650–1800Potosí · BoliviaFrom the mid-17th century, the shallow rich silver veins of Cerro Rico gradually became exhausted; mining grew harder and costlier, and output steadily declined. By the late 18th century, production was less than a tenth of its peak. After Bolivian independence in 1825, the Spanish colonial mining system formally ended, though small-scale mining in the district has continued to this day.