Legionary Fortress and Canabae: The Invisible Military City
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Transcript
This is the Carnuntum that requires imagination. Much of the legionary fortress is no longer visible above the modern ground, yet archaeology has mapped an enormous military installation of about eighteen hectares, built to house roughly five to six thousand soldiers.
Inside were not just barracks. A legion needed headquarters, the principia; a commander’s residence; workshops; storage; and a large military hospital, the valetudinarium. A permanent frontier army was a small city with a payroll, bureaucracy, medical service and appetite.
The fortress also generated another settlement around itself: the canabae legionis. Families, merchants and craftsmen lived on military land beside the camp, drawn by protection and by thousands of reliable customers. Roman military power was therefore an economic engine as well as a defensive system. Farther nearby stood an auxiliary fort that housed a cavalry unit of about five hundred men. Horse and mule remains help confirm the mounted role.
Carnuntum’s political history repeatedly passed through this military world. Marcus Aurelius used Carnuntum during the Marcomannic Wars; the second book of his Meditations is traditionally associated with his stay here. On 9 April 193, Septimius Severus — then governor of Pannonia Superior — was proclaimed emperor at Carnuntum. In 308, an imperial conference attempted to stabilise the Tetrarchic system. The exact room or patch of ground for these famous moments is not securely known, so do not let a map pin pretend otherwise.
The important point is scale. The legionary fortress, civilian city, military suburb, governor’s facilities and auxiliary installations formed an urban agglomeration, not a lonely fort at the end of the world. The frontier was heavily organised, expensive and crowded. Rome defended the Danube by building a society around its soldiers.