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I don't have sufficient context to write an accurate overview of "453." The only information provided is that it relates to a year, but without additional details about what "453" specifically refers to (a historical event, work of literature, scientific discovery, etc.), I cannot provide an accurate and factual overview.
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The Hunnic Empire (453)
Year 453 (CDLIII) was a common year starting on Thursday of the Julian calendar. At the time, it was known as the Year of the Consulship of Opilio and Vincomalus (or, less frequently, year 1206 Ab urbe condita). The denomination 453 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.