Quadriburgium
Quadriburgium Ammianus Marcellinus (18.2) mentions Quadriburgium among the fortresses on the Rhine which Julian repaired: Civitates occupatae sunt septem, Castra Herculis, Quadriburgium, Tricesimae, Novesium, Bonna, Antunnacum et Bingio.
There is however some corruption in the passage (note of Lindenbrog). The places seem to be mentioned in order from north to south. D'Anville conjectures that Quadriburgium is the same place as Burginatium [BURGINATIUM], following Cluver and Alting. (Ukert, Gallien, p. 528.) Other geographers conjecture solely from the resemblance of name that it may be Qualburg, not far from Clève, which appears to have been a Roman place, for Roman coins and inscriptions have been found there.
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.