Vĕtĕra, um, n.,
a town of Gallia Belgica, now Xanten , Tac. A. 1, 45; called also Vetera castra, id. H. 4, 18 and 21.
VETERA[CASTRA VETERA] ...
Dictionary of Greek and Roman Geography
CASTRA VETERA or VETERA, as Ptolemy (Ptol. 2.9) and others call it, a Roman camp near the Lower Rhin...