← Back to the map Archaeological plan of the principia (headquarters building) of the Praetorium Roman fort

Site plan of the principia of the Praetorium fort at Copaceni, Romania · Wikimedia Commons

Praetorium Fort

Praetorium

Auxiliary FortDacia · Copaceni, Racovita, Valcea County, RomaniaBuilt 138 CE

Not standing in 117 CE

About

Praetorium reinforced the Limes Alutanus roughly midway up the Olt valley, garrisoned by the numerus Burgariorum et Veredariorum, a unit of couriers and border guards. Built in 138 CE, it was strengthened with two additional corner towers two years later, and a civilian settlement with its own bathhouse grew up alongside it by the third century. The Olt has since eroded away roughly two-thirds of the fort, and what survives sits barely half a kilometer from its sister post, Praetorium II at Racovita. In 2024 UNESCO inscribed the site as part of the Frontiers of the Roman Empire World Heritage listing for Dacia. Construction here postdates Trajan's death by two decades, so despite anchoring the same Trajanic-era frontier line, it did not yet exist in 117 CE.

What happened here

Five hundred men, sometimes a thousand, recruited from a province rather than from citizens, and often stationed a long way from where they were raised. Cavalry units get a bigger fort and far more stabling; the smell tells you which kind you are in before the plan does. The layout copies a legionary fortress at a quarter of the size — headquarters, commander's house, granaries, barracks, a bath house usually built outside the walls because of the fire risk. Duties are patrolling, escorting, customs, and policing rather than pitched battle. After twenty-five years a man is discharged with citizenship for himself and his children, recorded on a bronze diploma he keeps for life. A village grows outside the gate within a decade.