Zosimus is believed to have been a Byzantine, as he wrote in Greek and cited Greek sources. His primary work was the polemic Historia Nova, a "new history" in which he attributes the fall of Roman power to barbarization and the decline of paganism. Although occasionally confusing people and chronologies, he is considered an important source for fourth and fifth century Roman history, and particularly studied for his account of Rome's withdrawal from Britain in the early fifth century.
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