Castrum Altinum, Roman fort in Alzey, Germany
The Castrum Altinum stands on a hilltop at 185 meters, featuring square fortifications with rounded corners and thick defensive walls measuring 163 meters by 159 meters.
Between 367 and 370 CE, Emperor Valentinian I ordered the construction of this fort to protect the Donau-Iller-Rhine border against Germanic invasions.
The fort includes preserved foundations of military barracks, workshops, and a central command building known as Principia, revealing details of Roman military architecture.
Located 30 kilometers southwest of Mainz, the site contains archaeological remnants of Roman fortifications that researchers have documented since initial discoveries in 1783.
The fort walls incorporated stones from an earlier Nymphaeum dating to 223 CE, which contained the first recorded mention of the settlement name Altiaia.
Location: Alzey
Elevation above the sea: 185 m
Part of: Donau-Iller-Rhein-Limes
GPS coordinates: 49.74300,8.11737
Latest update: March 14, 2025 19:20
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