events

At Carnuntum, Emperor emeritus Diocletian confers with Galerius, Augustus of the East, and Maximianus, the recently returned former Augustus of the West, in an attempt to end the civil wars of the Tetrarchy.

Historical image related to At Carnuntum, Emperor emeritus Diocletian confers with Galerius, Augustus of the East, and Maximianus, the recently returned former Augustus of the West, in an attempt to end the civil wars of the Tetrarchy. from November 11, 308

Carnuntum

Ancient Roman military outpost in modern Austria

Carnuntum was a Roman legionary fortress and headquarters of the Pannonian fleet from 50 AD. After the 1st century, it was capital of the Pannonia Superior province. It also became a large city of approximately 50,000 inhabitants.
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Diocletian

Roman emperor from 284 to 305

Diocletian, nicknamed Jovius, was Roman emperor from 284 until his abdication in 305. He was born Diocles to a family of low status in the Roman province of Dalmatia. As with other Illyrian soldiers of the period, Diocles rose through the ranks of the military early in his…
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Galerius

Roman emperor from 305 to 311

Galerius Valerius Maximianus was Roman emperor from 305 to 311. He participated in the system of government later known as the Tetrarchy, first acting as caesar under Emperor Diocletian. In this period Galerius obtained victory warring against the Persian Sassanian Empire,…
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Augustus (title)

Ancient Roman title

Augustus was the main title of the Roman emperors during Antiquity. It was given as both name and title to Gaius Julius Caesar Octavianus in 27 BC, marking his accession as Rome's first emperor. On his death, it became an official title of his successor, and was so used by all…
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Maximian

Roman emperor from 286 to 305

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, whose political brain complemented Maximian's military brawn. Maximian…
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Civil wars of the Tetrarchy

306–324 wars between Roman co-emperors

The civil wars of the Tetrarchy were a series of conflicts between the co-emperors of the Roman Empire, starting from 306 AD with the usurpation of Maxentius and the defeat of Severus to the defeat of Licinius at the hands of Constantine I in 324 AD.
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