Civilization: Roman Empire
Ruler: Constantius I "Chlorus"
Mint: Cyzicus
Year: 294 - 299 AD
Composition: Bronze
Denomination: Post-reform radiate
Diameter: 21.6mm
Weight: 2.69g
Reference: Cyzicus RIC 19a

Obverse
FL VAL CONSTANTIVS NOB CAES, radiate, draped and cuirassed bust right

Reverse
CONCORDIA MILITVM, Constantius standing right receiving globe from Jupiter standing opposite and holding a sceptre, K and officina letter T (3th officina) in lower centre

Post-reform radiate.

Constantius I, also known as Constantius Chlorus, ruled as a Caesar (293–305 CE) and later as an Augustus (305–306 CE) of the Roman Empire during the Tetrarchy established by Diocletian. His reign was defined by military campaigns, administrative reforms, and his role in stabilizing the western provinces.

Appointed Caesar in 293 CE, Constantius governed the western territories under Augustus Maximian. He focused on securing Britain and Gaul, regions that had been destabilized by internal rebellion and external invasions. In 296 CE, Constantius defeated the usurper Allectus, who had seized power in Britain after the rebellion of Carausius. This victory restored Roman control over Britain and reintegrated it into the empire. His campaigns along the Rhine frontier also successfully repelled Germanic incursions, solidifying Roman dominance in Gaul.

Constantius implemented administrative reforms to strengthen the empire's governance. He promoted economic recovery in the provinces under his control and improved defenses along the empire's borders. Despite his military focus, Constantius is noted for his relatively tolerant approach toward Christians compared to his contemporaries in the Tetrarchy, though he still participated in the enforcement of Diocletian's persecution of Christians.

In 305 CE, Constantius became Augustus of the West upon Diocletian and Maximian's abdication. His rule was brief, as he died in 306 CE while campaigning in Britain. His death prompted his troops to proclaim his son, Constantine I, as his successor, paving the way for the rise of Constantine and the eventual establishment of a Christian Roman Empire.