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by Panagiotis Karagiannis (Author)
This is a short study of the strategic importance of Nicomedia, arguing that Emperor Diocletian used his new eastern capital as the physical instrument for restructuring the Roman state following the chaotic Third-Century Crisis. Rejecting the traditions of Rome, Diocletian positioned Nicomedia near the crucial Persian and Danube frontiers, using its new mint, armories, and isolated imperial residence to centralize power and project the image of his autocratic system. The city's construction and meticulous court ceremony served as a political manifesto designed to legitimize the Tetrarchy (rule of four) and stabilize the empire's governance. Nicomedia also became the launchpad for the Great Persecution, as Diocletian sought to enforce religious conformity by purging the city of Christianity and restoring traditional paganism. Ultimately, while the Tetrarchy collapsed after Diocletian's abdication, the city's strategic and administrative model provided the direct blueprint for Constantine the Great when he founded Constantinople, ensuring that Nicomedia's structural reforms endured as the foundation of the Byzantine Empire.
