I don't have context provided about what "491 BC" specifically refers to. To write an accurate overview based only on the context you've mentioned, I would need more information about what event, person, or concept "491 BC" represents. Could you provide additional context?
AI-generated from the Wikipedia summary — may contain errors.
Year 491 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Consulship of Augurinus and Atratinus (or, less frequently, year 263 Ab urbe condita). The denomination 491 BC 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.
Events
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).