Marcus Flavius Valerius Constantius, also called Constantius I, was a Roman emperor from 305 to 306—and was father of Constantine the Great, the first Christian emperor of Rome. He was one of the four
Portrait usually identified with that of Constantius, Ny Carlsberg Glyptotek
Coin showing the Augusta Flavia Maximiana Theodora, Constantius's second wife, with the goddess Pietas on the reverse
On the reverse of this argenteus struck in Antioch under Constantius Chlorus, the tetrarchs are sacrificing to celebrate a victory against the Sarmatians.
Portrait head of Tetrarch, most likely Constantius Chlorus.
Maximian, nicknamed Herculius, was Roman emperor from 286 to 305. He was Caesar from 285 to 286, then Augustus from 286 to 305. He shared the latter title with his co-emperor and superior, Diocletian,
Constantius Chlorus
…career and rose to the top ranks of the army. Around 289, he divorced Helena, the mother of Constantine the Great, to marry a daughter of Emperor Maximian, and in 293 was added to the imperial college by Maximian's colleague Diocletian. Assigned to rule Gaul, Constantius defeated the usurper Carausius…
Portrait head from the villa of Chiragan, now on display at Musée Saint-Raymond, Toulouse
Antoninianus of Maximian. Legend: imp maximianus aug.
Aureus of Maximian. Legend: maximianus augustus.
Diocletian, Maximian's senior colleague and Augustus in the east.