The accession of Diocletian to the throne in 284 AD marks a turning point in the history of Rome and ushers in a new historical period. The political crisis was settled by the introduction of the system of the Tetrarchy, while administrative reorganisation and division of the state into smaller provinces and twelve dioceses contributed to economic recovery.
In time, the transfer of the capital to Thessalonike effected by Galerius, one of the Tetrarchs, and the new administrative system by praetorian prefecture established by Constantine the Great (305-337 AD), in combination with the prevalence of Christianity led to the gradual ebb of the Latin influence and to the Hellenization of the eastern part of the Roman Empire.
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