In his Easter table the year 532 AD was equated with the regnal year 248 of Emperor Diocletian.

A further massive transfer of Bastarnae was carried out by emperor Diocletian ( ruled 284-305 ) after he and his colleague Galerius defeated a coalition of Bastarnae and Carpi in 299.

Dalmatia was the birthplace of the Roman Emperor Diocletian, who, upon retirement from Emperor in AD 305, built a large palace near Salona, out of which the city of Split later developed.

Diocletian (; c. 22 December 244 – 3 December 311 ), was a Roman Emperor from 284 to 305.

After the deaths of Carus and his son Numerian on campaign in Persia, Diocletian was proclaimed Emperor.

The title was also claimed by Carus ' other surviving son, Carinus, but Diocletian defeated him in the Battle of the Margus.

Diocletian was probably born near Salona in Dalmatia ( Solin in modern Croatia ), some time around 244.

He was a man skilled in areas of government where Diocletian, presumably, had no experience.

Diocletian was not the only challenger to Carinus ' rule: the usurper M. Aurelius Julianus, Carinus ' corrector Venetiae, took control of northern Italy and Pannonia after Diocletian's accession.

It was all good publicity for Diocletian, and it aided in his portrayal of Carinus as a cruel and oppressive tyrant.

As leader of the united East, Diocletian was clearly the greater threat.

It was too much for a single person to control, and Diocletian needed a lieutenant.

The relationship between Diocletian and Maximian was quickly couched in religious terms.

Diocletian refused and fought a battle with them, but was unable to secure a complete victory.

Bahram II's gifts were widely recognized as symbolic of a victory in the ongoing conflict with Persia ; Diocletian was hailed as the " founder of eternal peace ".

Maximian's appointment is unusual in that it was impossible for Diocletian to have been present to witness the event.

It has even been suggested that Maximian usurped the title, and was only later recognized by Diocletian in hopes of avoiding civil war.

On his return to the East, Diocletian managed what was probably another rapid campaign against the resurgent Sarmatians.

Afterwards, during 299 and 302, as Diocletian was then residing in the East, it was Galerius ' turn to campaign victoriously on the Danube.

In a public ceremony at Antioch, the official version of events was clear: Galerius was responsible for the defeat ; Diocletian was not.

It is unclear if Diocletian was present to assist the campaign ; he might have returned to Egypt or Syria.

Diocletian later renamed Moesia Superior ( less Dacia Aureliana ) as Moesia Prima, and divided Moesia Inferior ( less its westernmost portions ) into Moesia Secunda and Scythia Minor.

From this time forward down to the latest period of the empire, for nearly a thousand years, the name occurs more or less frequently in the Fasti, and it was borne by the emperors Maximinus, Maximianus, Maxentius, Diocletian, Constantius, Constantine the Great and others.

Another term, perhaps more accurate if less common, for the cursus publicus is the cursus vehicularis, particularly in the period before the reforms of Diocletian.

Weakened by illness, Diocletian left the imperial office on 1 May 305, and became the only Roman emperor to voluntarily abdicate the position.

Between 303 and 305, Galerius began maneuvering to ensure that he would be in a position to take power from Constantius after the passing of Diocletian.

Tiridates owed his position to the Roman Emperor Diocletian, a noted persecutor of Christianity.

Tiridates owed his position to the Roman Emperor Diocletian, a noted persecutor of Christianity.

The table counted the years starting from the presumed birth of Christ, rather than the accession of the emperor Diocletian on 20 November 284, or as stated by Dionysius: " sed magis elegimus ab incarnatione Domini nostri Jesu Christi annorum tempora praenotare ..." It is assumed Dionysius Exiguus intended either 1 AD or 1 BC to be the year of Christ's birth ( a " year zero " does not exist in this calendar ).

Galerius, even more devoted and passionate than Diocletian, saw political advantage in the politics of persecution.

Altogether, Diocletian effected a large increase in the number of bureaucrats at the government's command ; Lactantius was to claim that there were now more men using tax money than there were paying it.

These dukes sometimes administered two or three of the new provinces created by Diocletian, and had forces ranging from two thousand to more than twenty thousand men.

Lactantius criticized Diocletian for an excessive increase in troop sizes, declaring that " each of the four strove to have a far larger number of troops than previous emperors had when they were governing the state alone ".

The fifth-century pagan Zosimus, by contrast, praised Diocletian for keeping troops on the borders, rather than keeping them in the cities, as Constantine was held to have done.

* Emperor Diocletian issues his Edict on Maximum Prices, which, rather than halting rampant inflation and stabilizing the economy, adds to inflationary pressures by flooding the economy with new coinage and by setting price limits too low.

He issued the first proper silver coins that had appeared in the Roman Empire for generations, knowing that good quality bullion coinage would enhance his legitimacy and make him look more successful than Diocletian and Maximian.

As mention is made in it of the baths of Diocletian, it cannot be earlier than the 4th century.

The first is that the Greek and Latin legends of Saint Christopher identify him as belonging to the Third Valerian Cohort of the Marmantae ( Latin: Cohors tertia Valeria, at Marmantarum ), a military unit of Northern Africa of Marmarica ( between modern day Libya and Egypt ), recruited by none other than the Emperor Diocletian.

The period when the emperors that called themselves princeps ruled-from Augustus to Diocletian-is called " the Principate ", while no later than under Diocletian began " the Dominate " period.

Then came the Western Roman Emperor Maximian who, according to Voragine, was " much worse than was Diocletian.

Species of fraudulence begin with the ascription of the various biographies to different invented ' authors ', and continue with the dedicatory epistles to Diocletian and Constantine, the quotation of fabricated documents, the citation of non-existent authorities, the invention of persons ( extending even to the subjects of some of the minor biographies ), presentation of contradictory information to confuse an issue while making a show of objectivity, deliberately false statements, and the inclusion of material which can be shown to relate to events or personages of the late 4th century rather than the period supposedly being written about.

The tetrarchy reform of Diocletian ( c. 296 ) multiplied the office, there was a praetorian prefect as chief of staff ( military and administrative )— rather than commander of the guard — for each of two Augusti, but not for the two Caesars.

With the benefit of archaeological discoveries of recent decades, many contemporary historians view the late army as no larger than its predecessor: under Diocletian c. 390, 000 ( the same as under Hadrian almost 2 centuries earlier ) and under Constantine no greater, and probably somewhat smaller, than the Principate peak of c. 440, 000.

He was a schoolmaster at Imola, but rather than sacrifice to the Roman gods, as so ordered by the current emperor, Julian the Apostate, he was condemned to death and turned over to his own students ( some authorities write that this event took place during the reign of Diocletian ).

After the imperial administration reforms of Diocletian, the peninsula is a diocese divided into six provinces that were much smaller than before.

Rather than maintain the traditional infantry-heavy legions, Diocletian reformed it into limitanei (" border ") and comitatenses (" field ") units.

From Diocletian to Theodosius I, namely during approximately 100 years, more than 2, 000 laws were issued.

Eusebius also attributes the initiative for the purge to Galerius, rather than Diocletian.

Newly prestigious and influential after his victories in the Persian war, Galerius might have wished to compensate for a previous humiliation at Antioch, when Diocletian had forced him to walk at the front of the imperial caravan, rather than inside it.