The administrative system in the Early Byzantine period was a continuation of the reforms begun by Diocletian (284-305) and continued by Constantine (324-337). These reforms significantly expanded the imperial bureaucracy while significantly reducing the size of the provinces. The main point of the administration was to provide the necessary security and financial needs of the empire. The Roman Empire, since the end of the reign of Marcus Aurelius (161-180) had faced nearly a century of crises, both economic and security. Diocletian’s reforms were meant to address these matters, and most of his reforms were kept in place throughout the early Byzantine period until the Arab conquests of the seventh century lead to major reforms once again.