During the 6th through 3rd centuries BC how much copper was mined in Rome?
Romans in the 6th through 3rd centuries BC used copper lumps as money.
В течение 6-3 веков до н. э. сколько меди было добыто в Риме?
Римляне в 6-3 веках до нашей эры использовали медные куски в качестве денег.