Marcus Piavonius Victorinus was emperor in the Gallic provinces from 268 to 270 or 269 to 271, following the brief reign of Marius. He was murdered by a jealous husband whose wife he tried to seduce.

Hailing from Gaul, Victorinus was born to a family of great wealth, and was a soldier under Postumus, the first of the so-called Gallic emperors. He showed considerable ability, as he held the title of tribunus praetorianorum (tribune of the praetorians) in 266/267, and rose swiftly to become co-consul with Postumus in 268. It is also possible that Postumus then elevated him to the post of praetorian prefect.

After engineering the death of Marius, Victorinus was declared emperor by the troops located at Augusta Treverorum in the fall of 269. His principal concern was to prevent the western provinces from submitting to the central authority of the Roman Empire, a fact made clear to him from the first few weeks when only the provinces of Gaul, Germania and Britain recognised him. Hispania deserted the Gallic Empire and declared its loyalty to Claudius Gothicus. Claudius then sent his trusted general Placidianus to south-east Gaul with instructions to bring over as many of the wavering cities as he could. Very quickly Placidianus captured Cularo (ancient Grenoble), but did not proceed any further.

The presence of Placidianus inspired the city of Augustodunum Haeduorum to abandon Victorinus and declare its intention to declare for Claudius Gothicus. This forced Victorinus to march south and besiege it, where it fell after seven months, after which Victorinus’ troops plundered and destroyed the city. Victorinus returned to Colonia Claudia Ara Agrippinensium in triumph. It remains a mystery just why Claudius did not authorise Placidianus to go to the relief of Augustodunum Haeduorum; however, it is speculated that Claudius, who was fully engaged either in Italy against the Alamanni or in the Balkans against the Goths, did not wish to open a second theatre of operations in Gaul, which would not only have involved a major military effort, but would also have required Claudius to assume responsibility for the defense of the Rhine frontier had he been successful. There is evidence to suggest that Claudius was having some difficulties in the East, which also occupied his attention.

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