Ergastŭlum
A prison and place of correction attached to the farms and country-villas of the Romans, in
which those of the slave
familia who were kept in fetters (
compediti, nexi, vincti) were lodged and made to work in irons;
whereas the rest, who were not chained, were provided with separate accommodation (
cellae, contubernia) in other parts of the establishment (Columell. i. 6.3;
cf. 8.16; Apul.
Apol. p. 482; Brut. in
Cic.
Fam. xi. 13).