Obverse legend : IMP C DIOCLETIANVS P F AVG.
Obverse description : Tête laurée de Dioclétien à droite (O*).
Obverse translation : “Imperator Cæsar Diocletianus Pius Felix Augustus”, (L’empereur césar Dioclétien pieux heureux auguste).
Reverse legend : GENIO POPVLI ROMANI/ -|-// LA.
Reverse description : Genius (Génie) debout à gauche, coiffé du modius, le manteau sur l'épaule gauche, tenant une patère de la main droite et une corne d'abondance de la main gauche.
Reverse translation : “Genio Populi Romani”, (Au Génie du Peuple romain).
(20/11/284-1/05/305) Caius Aurelius Valerius Diocletianus
Diocletian, born in 245 in Dalmatia (Split), is an Illyrian emperor. It takes the purple after removing Aper, the praetorian prefect, stepfather and assassin Numerian, 20 November 284. Struggling against Carin first, last son of Carus, he was defeated at Margus the following year, but was assassinated and Carin Diocletian left alone august. He appoints Maximian, a compatriot, caesar in November 285 and august 1 April 286. It has created a new political regime, the diarchy where two emperors share the military and political power, but is still subject to Maximian Diocletian. Diocletian is placed under the protection Jovian (Jupiter) while Maximian is Herculean gasoline (Hercules). Diocletian spent the first ten years of his reign waging war in the East, while Maximian rest in the West. Diocletian was the first emperor of the Lower Empire, in the words of Gibbons, and founder of the dominat.