The Tetrarchy was the system instituted by Roman emperor Diocletian in 293 AD to govern the ancient Roman Empire by dividing it between two emperors, the augusti, and their junior colleagues and designated successors, the caesares.
On the reverse of this argenteus struck in Antioch under Constantius I, the tetrarchs offer sacrifice to celebrate a victory against the Sarmatians.
Image: Istanbul Museo archeol. Diocleziano (284 305 d.C.) Foto G. Dall'Orto 28 5 2006
Image: Musée Saint Raymond 2017 09 02 Inv. Ra 34b 4654
Galerius Valerius Maximinus, born as Daza, was Roman emperor from 310 to 313. He became embroiled in the civil wars of the Tetrarchy between rival claimants for control of the empire, in which he was defeated by Licinius. A committed pagan, he engaged in one of the last persecutions of Christians, before issuing an edict of tolerance near his death.
Coin of Maximinus, with the legend: Maximinus p(ius) f(elix) aug(ustus)
Plaster cast in the Pushkin Museum of a porphyry bust of a tetrarch from Athribis, now in the Cairo Museum. The bust is labelled as Maximinus, but this cannot be confirmed. It probably depicts Galerius instead.