AI overview
I don't have enough context to provide an accurate overview. "458" could refer to many things (a year, a law, a route, a product model, etc.), and you've only provided "year" as context, which is insufficient to determine what specific "458" you're asking about or why it would matter to a general reader.
AI-generated from the Wikipedia summary — may contain errors.
Article
Campaign of emperor Majorian (458–461)
Year 458 (CDLVIII) was a common year starting on Wednesday of the Julian calendar. At the time, it was known as the Year of the Consulship of Maiorianus and Leo (or, less frequently, year 1211 Ab urbe condita). The denomination 458 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.