The dissemination of imperial law to the provinces was facilitated under Diocletian's reign, because Diocletian's reform of the Empire's provincial structure meant that there were now a greater number of governors ( praesides ) ruling over smaller regions and smaller populations.

The Corpus drew on the codices of Codex Gregorianus | Gregorius and Codex Hermogenianus | Hermogenian, drafted and published under Diocletian's reign.

Emperors in the forty years preceding Diocletian's reign had not managed these duties so effectively, and their output in attested rescripts is low.

Diocletian's reign marks the end of the classical period of Roman law.

The most that can be said about built structures under Diocletian's reign is that he rebuilt and strengthened forts at the Upper Rhine frontier ( where he followed the works made under Probus's reign, both along the Lake Constance-Basel as well as along the Rhine – Iller – Danube line ), in Egypt, and on the frontier with Persia.

Diocletian's reforms also increased the number of financial officials in the provinces: more rationales and magistri privatae are attested under Diocletian's reign than before.

Under his reign Michelangelo re-built the basilica of Santa Maria degli Angeli ( in the Diocletian's Baths ) and the eponymous Villa Pia, now known as Casina Pio IV and headquarters of the Pontifical Academy of Sciences, was designed by Pirro Ligorio in the Vatican Gardens.

Gaining sole reign of the empire, he is also noted for re-establishing a single imperial capital, choosing the site of ancient Byzantium in 330 ( over of the current capitals, which had effectively been changed by Diocletian's reforms to Milan in the West, and Nicomedia in the East ) to build the city soon called Nova Roma ( New Rome ); it was later renamed Constantinople in his honor.

He seems not to have served in any important military or administrative position during Diocletian's and his father's reign, though.

By the end of Diocletian's reign in 305, the Edict was for all practical purposes ignored.

These coins held their value during Diocletian's reign, but aside from the bronze and copper coins, which were mass produced, they were minted only very rarely and had little effect on the economy.

Emperor Constantine completed Diocletian's reforms and organized the Roman Empire into four pretorian prefectures late in his reign, actually the former territorial circumscriptions of the former four imperial tetrarchs to which each praetorian prefect had acted as chief of staff: the Prefecture of the Gauls, the Prefecture of Italy and Africa, the Prefecture of Illyricum, and the Prefecture of Oriens, with each administrated by an imperially appointed Praetorian prefect.

The rate of pay of the scribes in Diocletian's reign was fixed by his edict de pretiis rerum venalium at 25 denarii for 100 στιχοι in writing of the first quality, and at 20 denarii for the second quality ; what the difference was between the two qualities does not appear.

One quarter of all inscriptions referring to temple repairs in North Africa between 276 and 295 date to Diocletian's reign.

The Christian Arnobius, writing during Diocletian's reign, attributes financial concerns to provisioners of pagan services: The augurs, the dream interpreters, the soothsayers, the prophets, and the priestlings, ever vain ... fearing that their own arts be brought to nought, and that they may extort but scanty contributions from the devotees, now few and infrequent, cry aloud, ' The gods are neglected, and in the temples there is now a very thin attendance.

In spite of his failures, Diocletian's reforms fundamentally changed the structure of Roman imperial government and helped stabilize the Empire economically and militarily, enabling the Empire to remain essentially intact for another hundred years despite having seemed near the brink of collapse in Diocletian's youth.

Diocletian's stay in the East saw diplomatic success in the conflict with Persia: in 287, Bahram II granted him precious gifts, declared open friendship with the Empire, and invited Diocletian to visit him.

Diocletian's reforms shifted the governors ' main function to that of the presiding official in the lower courts: whereas in the early Empire military and judicial functions were the function of governor, and procurators had supervised taxation ; under the new system vicarii and governors were responsible for justice and taxation, and a new class of duces (" dukes "), acting independently of the civil service, had military command.

The sharp increase in the number of edicts and rescripts produced under Diocletian's rule has been read as evidence of an ongoing effort to realign the whole Empire on terms dictated by the imperial center.

The Tetrarchy | Tetrarchs were the four co-rulers who governed the Roman Empire as long as Diocletian's reform lasted.

During the Roman Empire when Sisak was known as Siscia, Christian martyr Quirinus of Sescia was tortured and nearly killed during Diocletian's persecution of Christians.

They include his Fastes de l ' empire romain (" The Splendours of the Roman Empire "), and editions of Diocletian's Edict on Maximum Prices and of Philippe Lebas ' Voyage archéologique ( 1868 – 1877 ).

The Tetrarchy ultimately degenerated into civil war, but the eventual victor, Constantine the Great, restored Diocletian's system of dividing the Empire into East and West.

A Western Roman Empire existed intermittently in several periods between the 3rd and 5th centuries, after Diocletian's Tetrarchy and the reunifications associated with Constantine the Great and Julian the Apostate ( 324 – 363 ).

The argenteus was a silver coin produced by the Roman Empire from the time of Diocletian's coinage reform in AD 294 to ca.

* Both the notion of " partnership " in the form of a senior emperor and several junior co-emperors ( usually, but not necessarily, his sons ), and Diocletian's titulature, but mainly versed in Greek ( e. g. Sebastos for Augustus, a literal translation ), became quite common is the Eastern Roman Empire, i. e. Byzantium, which lasted a further millennium after the fall of the Western Empire.

Following Diocletian's abdication in 305, civil war erupted among the various co-emperors, during which time each of the contenders appointed his own prefect, a pattern carried on during the period where the Empire was shared between Licinius and Constantine I.

In the 6th Century, when Justinian increasingly reversed Diocletian's strict separation of civil and military authority, praeses granted military authority over their province were generally elevated to the related, older term Praetor.

Not all of Diocletian's plans were successful: the Edict on Maximum Prices ( 301 ), his attempt to curb inflation via price controls, was counterproductive and quickly ignored.

Although effective while he ruled, Diocletian's Tetrarchic system collapsed after his abdication under the competing dynastic claims of Maxentius and Constantine, sons of Maximian and Constantius respectively.

Diocletian's elevation of Bassus as consul symbolized his rejection of Carinus ' government in Rome, his refusal to accept second-tier status to any other emperor, and his willingness to continue the long-standing collaboration between the Empire's senatorial and military aristocracies.

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 is possible that Flavius Constantius, the governor of Dalmatia and Diocletian's associate in the household guard, had already defected to Diocletian in the early spring.

Following Diocletian's victory, both the western and the eastern armies acclaimed him Augustus.

It has been surmised that the ceremonies were arranged to demonstrate Diocletian's continuing support for his faltering colleague.

In the spring of 293, in either Philippopolis ( Plovdiv, Bulgaria ) or Sirmium, Diocletian would do the same for Galerius, husband to Diocletian's daughter Valeria, and perhaps Diocletian's praetorian prefect.

In preparation for their future roles, Constantine and Maxentius were taken to Diocletian's court in Nicomedia.

Diocletian's attempts to bring the Egyptian tax system in line with Imperial standards stirred discontent, and a revolt swept the region after Galerius ' departure.

Alexandria, whose defense was organized under Diocletian's former corrector Aurelius Achilleus, held out until a later date, probably March 298.

Bureaucratic affairs were completed during Diocletian's stay: a census took place, and Alexandria, in punishment for its rebellion, lost the ability to mint independently.

Diocletian's reforms in the region, combined with those of Septimus Severus, brought Egyptian administrative practices much closer to Roman standards.

Antioch was Diocletian's primary residence from 299 to 302, while Galerius swapped places with his Augustus on the Middle and Lower Danube.

The next day, Diocletian's first " Edict against the Christians " was published.

Diocletian was demonized by his Christian successors: Lactantius intimated that Diocletian's ascendancy heralded the apocalypse, and in Serbian mythology, Diocletian is remembered as Dukljan, the adversary of God.

Maximian, according to these accounts, swore to uphold Diocletian's plan in a ceremony in the Temple of Jupiter.

Rumors alleging that Diocletian's death was merely being kept secret until Galerius could come to assume power spread through the city.

Maximin appeared and took Diocletian's robes.