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In OTL the roman empire hardly could be called a monarchy, as their rulers usually fell to coups or to assassinations that resulted on a general or politician rising to power with their own clique to become the next emperor, and this was also true to the pre Makedon dynasty byzantine empire, and so I come here with this discussion: How could the roman empire could have one house ruling it with a PoD after the crisis of the third century? And what changes this would bring?
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