Las Médulas: Roman Spain's largest gold mine exploited from 1st century AD. Las Médulas was the most spectacular of Roman Spain's gold mines Exploitation began early in the 1st century AD, after Augustus added the region to the empire A workforce sometimes swelling to 20,000 men worked the site over approximately 150 years
Las Médulas in Spain was the crown jewel of Roman gold mining. After Augustus brought the region into the empire in the early 1st century AD, up to 20,000 workers toiled there for around 150 years. Gold was trapped in clay and sand buried under 100m of waste rock. The most perilous jobs fell to condemned prisoners.⛏️
Key Facts
- Las Médulas was the most spectacular of Roman Spain's gold mines
- Exploitation began early in the 1st century AD, after Augustus added the region to the empire
- A workforce sometimes swelling to 20,000 men worked the site over approximately 150 years
- Gold was embedded in layers of sand and clay eroded from the Somiedo mountains
- Gold-bearing strata were buried beneath up to 100 meters of sterile sediment
- Near-surface gold was extracted using converging trenches and hydraulic washing, analogous to California gold rush hydraulic mining
- Empire-owned mines were overseen by an imperial procurator and managed by imperial freedmen leasing concessions to private contractors
- The most dangerous work was done by condemned prisoners
Related site: Las Médulas — view location, images, and history on the Ancient Nerds map.
Source: The Roman Gold Mine that Ate Mountains by toldinstone