Fabri
The mechanics, carpenters, smiths, etc., in the Roman army. After the end of the republican
age they formed an independent corps in every army, and were employed especially in the
restoration of bridges, siege and defence works, artillery, etc. They were under the command
of the
praefectus fabrûm, or chief engineer, who was chosen by
the general-in-chief, and was immediately responsible to him.