Castra Brigetio
About
CORRECTION TO INITIAL BRIEF: Legio XXX Ulpia Victrix's 117 CE base was Brigetio, not Vetera. The legion was raised by Trajan (c. 101-105 CE, sources vary) for the Dacian Wars and, once XI Claudia vacated Brigetio for Durostorum, took over that Pannonian fortress from 105 CE. It held Brigetio through the entire 117 CE snapshot and only moved to Vetera (Xanten) in 122 CE, when Hadrian sent VI Victrix (Vetera's prior occupant) to Britain and reassigned XXX Ulpia Victrix into the vacated fortress — coincidentally the same year Legio I Adiutrix returned from the East to reclaim Brigetio (see that entry's note on the same swap).
What happened here
A legionary fortress holds five thousand men and is laid out to the same plan everywhere, so a transferred soldier knows his way around on the first day. Two main streets cross at the headquarters building, where the standards and the pay chest are kept in a sunken strongroom under guard. Around it: the commander's house with a courtyard garden, granaries raised on stone piers, a hospital, workshops, and long barrack blocks divided into rooms for eight men who cook and mess together. Training is daily, and building work is constant — soldiers make their own bricks, tiles and boots. A civilian town grows against the walls, with bars, traders and the unofficial families of men who are not legally allowed to marry.
Sources
Roman Maps shows the empire frozen at 11 August 117 CE, the day Trajan died — its moment of greatest territorial extent. Explore the full map →