conditions in the silver mines at Laureion in south-eastern Attica after the discovery of a major vein of silver-bearing ore there in 483 BC, while the phenomenon of skilled slave craftsmen producing manufactured goods in small factories and workshops became increasingly common.

Furthermore, slave-ownership no longer became the preserve of the rich: all but the poorest of Athenian households came to have slaves in order to supplement the work of their free members. The slaves of Athens that had "barbarian"