Gelduba
Gelduba is described by Pliny (19.5) as a castellum Rheno impositum.
It is mentioned by Tacitus several times (Hist. 4.26, 32, 36, &c.), from whom we may collect that it was near Novesium. The Antonine Itin. places it on the left bank of the Rhine, on the road from Cologne to Leiden, between Novesium (Neuss) and Calo [CALO]. The distances and the modern name, Gellep or Gelb, determine the position of Gelduba.
From William Smith (ed.), Dictionary of Greek and Roman Geography. Text provided under a CC BY-SA license by Perseus Digital Library, http://www.perseus.tufts.edu, with funding from the National Endowment for the Humanities and Tufts University. Data accessed from https://github.com/PerseusDL/canonical-pdlrefwk/ on 17 October 2026.