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Zwentendorf Roman Fort

Piro Torto
Auxiliary FortNoricum · Zwentendorf an der Donau, AustriaBuilt 300 CE
Not standing in 117 CE

About

The Tabula Peutingeriana records a station called Piro Torto sitting exactly 8 Roman miles from both Comagena and Traismauer on the Vindobona-Lauriacum road, and researchers matched that distance to modern Zwentendorf. Unlike its Domitianic-era neighbors along this stretch of the Danube, the fort here belongs to the late Roman building program, going up roughly two centuries after Trajan's death. Excavations in the late 1950s and early 1960s uncovered one of the better-documented late Roman forts on the whole Austrian limes. UNESCO folded the site into the Danube Limes World Heritage listing in 2021.

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.

Sources

Nearby

Tulln Roman Fort
11 km
Zeiselmauer Roman Fort
19 km
Mautern Roman Fort
24 km
Klosterneuburg Roman Fort
31 km
Fortress of Legio X Gemina (Vindobona)
37 km
Pöchlarn Roman Fort
56 km
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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 →