Diocletianus társsászára volt, de lemondatták.

CAESAR GAIVS AVRELIVS VALERIVS MAXIMIANVS AVGVSTVS

Emperor Maximian ruled the western half of the Roman Empire from 286 to 310. During his reign, the coinage underwent significant changes. In the tetrarchy system introduced in 286, Maximian held the title of Western Emperor, and his co-emperor was Diocletian, the Eastern Emperor. The two emperors were considered equal and appeared together on all coins. The introduction of the tetrarchy in coinage brought many innovations. Portraits of emperors became larger and often appeared in powerful, warrior depictions. Roman gods or symbols were often placed on the reverse side of the coins. Among Maximian's coins, the following stand out: The solidus gold coin introduced in 286, which became the most valuable coin of the Roman Empire. The follis silver coin minted in 294, which became the empire's most used coin. Aureus gold coin introduced in 306, which became the official imperial coin of the tetrarchy system. During the reign of Maximian, the quality of coinage improved significantly. Coins became finer and more accurately minted. This improvement was due to the fact that the empire's economy was stable and the quality of the materials used for coinage also improved. Maximian's coinage is important for learning about the history of the Roman Empire. These coins bear witness to the development of the empire's economy, the tetrarchy system, and the importance of Maximian's reign.