Rotomagus
Ῥατόμαγος
Rotomagus (Ῥατόμαγος), in Gallia Lugdunensis, is mentioned by Ptolemy (2.8.8) as the capital of the Veneliocasi, as the name is written in some editions. [VELLOCASSES] In the Table the name is written Rattomagus, with the mark which indicates a capital town; and in the Antonine Itin. it occurs in the corrupted form Latomagus on the road which runs from a place called Carocotinum. Ammianus (15.11) speaks of it in the plural number Rotomagi. There are said to be coins with the legend Ratumacos.
Rotomagus is Rouen on the north side of the Seine, and the capital of the department of Seine Inférieure. The old Gallic name was shortened to Rotomum or Rodomum, and then to Rouen, as Rodumna has been shortened to Roanne. The situation of Rouen probably made it a town of some importance under the Roman Empire, but very few Roman remains have been found in Rouen. Some Roman tombs have been mentioned.
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.