Castra Alteium

The Castra Alteium is a former late-Roman border fort on the Danube-Iller-Rhine Limes.: X.IV.3  It is located in the territory of the city of Alzey in Rhenish Hesse, Germany. The fort was presumably built in the course of the last reconstruction measures on the Rhine frontier between 367 and 370 AD under the western Emperor Valentinian I. Previously, there was a Roman civilian settlement, Altiaia, which was devastated by Alamanni in 352/353. The fort was also destroyed twice, and probably abandoned at the end of the fifth century.