Castra Aquincum
About
Legio II Adiutrix, like I Adiutrix raised from fleet marines (68-70 CE), fought in Trajan's Dacian Wars based temporarily at Singidunum, then was permanently transferred to Aquincum in 106 CE once the new province of Pannonia Inferior was organized, becoming that province's senior garrison and the anchor of what grew into Aquincum's civilian town (later Pannonia Inferior's capital). Its earlier wood-and-earth camp was under stone reconstruction during Hadrian's reign, begun essentially at the 117 CE snapshot.
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.
In ancient writing
- Ptolemy, Geography 2.15
Ptolemy's gazetteer of Pannonia Inferior lists Aquincum among the province's towns with coordinates — a bare place-name entry rather than a narrative description.
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 →